This study investigates the impact of carbon tax policies on carbon emission reductions in G20 countries to support the achievement of the Net Zero Emissions target by 2060.As the G20 collectively accounts for a signi...This study investigates the impact of carbon tax policies on carbon emission reductions in G20 countries to support the achievement of the Net Zero Emissions target by 2060.As the G20 collectively accounts for a significant share of global greenhouse gas emissions,effective policy interventions in these nations are pivotal to addressing the climate crisis.The research employs the Pearson correlation test to quantify the statistical relationship between carbon tax rates and emission levels,alongside a content analysis of sustainability reports from G20 countries to evaluate policy implementation and outcomes.The results reveal a moderate yet statistically significant negative correlation(r=-0.30,p<0.05),indicating that higher carbon taxes are associated with lower emission levels.Content analysis further demonstrates that countries with high and consistently enforced carbon taxes,such as Japan and South Korea,achieve more substantial emissions reductions compared to nations with lower tax rates or inconsistent policy implementation.The findings emphasize that while carbon taxes serve as an effective instrument to internalize the social costs of carbon pollution,their impact is maximized when integrated with broader strategies,including investments in renewable energy,advancements in energy efficiency,and technological innovation.This research contributes to the understanding of carbon tax effectiveness and offers policy recommendations to strengthen fiscal measures as part of comprehensive climate action strategies toward achieving global sustainability targets.展开更多
Coal and carbon-containing waste are valuable primary and secondary carbon carriers.In the current dominant linear economy,such carbon resources are generally combusted to produce electricity and heat and as a way to ...Coal and carbon-containing waste are valuable primary and secondary carbon carriers.In the current dominant linear economy,such carbon resources are generally combusted to produce electricity and heat and as a way to resolve a nation’s waste issue.Not only is this a wastage of precious carbon resources,which can be chemically utilized as raw materials for production of other value-added goods,it is also contrary to international efforts to reduce carbon emissions and increase resource efficiency and conservation.This article presents a concept to support the transformation from a linear‘one-way cradle to grave manufacturing model’toward a circular carbon economy.The development of new and sustainable value chains through the utilization of coal and waste as alternative raw materials for the chemical industry via a coupling of the energy,chemical and waste management sectors offers a viable and future-oriented perspective for closing the carbon cycle.Further benefits also include a lowering of the carbon footprint and increasing resource efficiency and conservation of primary carbon resources.In addition,technological innovations and developments that are necessary to support a successful sector coupling will be identified.To illustrate our concept,a case analysis of domestic coal and waste as alternative feedstock to imported crude oil for chemical production in Germany will be presented.Last but not least,challenges posed by path dependency along technological,institutional and human dimensions in the sociotechnical system for a successful transition toward a circular carbon economy will be discussed.展开更多
Decrease of energy consumption in buildings and increase of the share of renewable energies in them are currently technologically and economically feasible and it is promoted by E.U. policies. After 2019, all the new ...Decrease of energy consumption in buildings and increase of the share of renewable energies in them are currently technologically and economically feasible and it is promoted by E.U. policies. After 2019, all the new public buildings in EU countries must be near zero energy buildings reducing their energy consumption and CO<sub>2</sub> emissions. Use of various renewable energies for heat and power generation in school buildings in Crete-Greece can result in zeroing their fossil fuels consumption and CO<sub>2</sub> emissions. Purpose of the current work is to investigate the possibilities of creating zero CO<sub>2</sub> emissions school buildings in Crete-Greece due to operational energy use in them. A methodology which allows the replacement of fossil fuels with renewable energies in school buildings is proposed. Solar energy, solid biomass and low enthalpy geothermal energy, which are abundant in Crete, can be used for that. School buildings in Greece consume significantly less energy, 68 KWh/m<sup>2</sup> year, and emit less CO<sub>2</sub>, 28 kgCO<sub>2</sub>/m<sup>2</sup> year, than the corresponding buildings in other countries. The installation cost of renewable energies systems in order to replace all fossil fuels used in school buildings in Crete-Greece and to zero their CO<sub>2</sub> consumption due to energy use in them has been estimated at 47.42 - 87.71 €/m<sup>2</sup>, which corresponds to 1.69 - 3.13 €/kg CO<sub>2</sub> saved.展开更多
The Conference of the Parties(COP26 and 27)placed significant emphasis on climate financing policies with the objective of achieving net zero emissions and carbon neutrality.However,studies on the implementation of th...The Conference of the Parties(COP26 and 27)placed significant emphasis on climate financing policies with the objective of achieving net zero emissions and carbon neutrality.However,studies on the implementation of this policy proposition are limited.To address this gap in the literature,this study employs machine learning techniques,specifically natural language processing(NLP),to examine 77 climate bond(CB)policies from 32 countries within the context of climate financing.The findings indicate that“sustainability”and“carbon emissions control”are the most outlined policy objectives in these CB policies.Additionally,the study highlights that most CB funds are invested toward energy projects(i.e.,renewable,clean,and efficient initiatives).However,there has been a notable shift in the allocation of CB funds from climate-friendly energy projects to the construction sector between 2015 and 2019.This shift raises concerns about the potential redirection of funds from climate-focused investments to the real estate industry,potentially leading to the greenwashing of climate funds.Furthermore,policy sentiment analysis revealed that a minority of policies hold skeptical views on climate change,which may negatively influence climate actions.Thus,the findings highlight that the effective implementation of CB policies depends on policy goals,objectives,and sentiments.Finally,this study contributes to the literature by employing NLP techniques to understand policy sentiments in climate financing.展开更多
On June 5,2025,with the theme“Co-drive Sustainable Journey,Cocreate for Shared Success”,BASF participates in the 2025 Shanghai International Carbon Neutrality Expo in Technologies,Products and Achievements(CNE).Thro...On June 5,2025,with the theme“Co-drive Sustainable Journey,Cocreate for Shared Success”,BASF participates in the 2025 Shanghai International Carbon Neutrality Expo in Technologies,Products and Achievements(CNE).Through three sections titled“renewable energy”,“alternative raw materials”,and“new technologies”,BASF presents its latest progress towards its goal of net-zero greenhouse gas emissions by 2050,along with its innovative low-carbon technologies and co-creations with its partners.展开更多
From the perspective of water resources, coal chemical enterprises should pay attention to the recycling and economical utilization of water resources in the front-end stage of supply and use, so as to reduce the pres...From the perspective of water resources, coal chemical enterprises should pay attention to the recycling and economical utilization of water resources in the front-end stage of supply and use, so as to reduce the pressure of end water treatment, so as to control the utilization and treatment cost of water.With the rapid development of coal chemical industry, the realization of zero discharge of coal chemical wastewater has become a focus.In the treatment of coal chemical wastewater, effective measures should be taken to reduce and reuse pollutants, effectively improve resource utilization and seek the road of sustainable development.展开更多
Petroleum has played a vital role as the major supplier of materials and energy during the evolution of human civilization.Given the change in demand for energy from high to low carbon and ultimately net zero carbon,t...Petroleum has played a vital role as the major supplier of materials and energy during the evolution of human civilization.Given the change in demand for energy from high to low carbon and ultimately net zero carbon,the energy framework has undergone revolutionary changes.The energy attribute of petroleum will be gradually weakened,while the material and CO_(2)emission attributes will be gradually strengthened.Thus,the petrochemical processing basis,scientific concepts,and ideas will undergo major adjustments to reshape the petrochemical industry.Hence,it is necessary to reconsider the evolution of the petrochemical industry from a historical perspective and to clarify the historical causes,development contexts,and possible challenges in future development.Herein,we critically reassess the key drivers and rules guiding the development of the petrochemical industry and propose a reconstruction strategy based on simplified engineering thinking,innate nature of energy and material,and CO_(2)emissions,which can be realized through the integration of gasification with CO as the target product and recent C1 chemistry targeting the precise synthesis of chemicals.The concept of the petrochemical industry will change from the product-based process of selection and transformation of raw material molecules to the process of carbon atom reconfiguration driven by product CO_(2)emissions.More accurate management of C atoms can be accomplished with greatly improved utilization efficiency and the reduction of separation intensity and CO_(2)emissions via the stepwise introduction of a new approach in the current petrochemical industry.展开更多
In the pursuit of global net zero carbon emissions and climate change mitigation,ongoing research into sustainable energy sources and emission control is paramount.This review examines methane leakage from abandoned o...In the pursuit of global net zero carbon emissions and climate change mitigation,ongoing research into sustainable energy sources and emission control is paramount.This review examines methane leakage from abandoned oil and gas(AOG)wells,focusing particularly on Lubbock,a geographic area situated within the larger region known as the Permian Basin in West Texas,United States.The objective is to assess the extent and environmental implications of methane leakage from these wells.The analysis integrates pertinent literature,governmental and industry data,and prior Lubbock reports.Factors affecting methane leakage,including well integrity,geological characteristics,and human activities,are explored.Our research estimates 1781 drilled wells in Lubbock,forming a foundation for targeted assessments and monitoring due to historical drilling trends.The hierarchy of well statuses in Lubbock highlights the prevalence of“active oil wells,”trailed by“plugged and abandoned oil wells”and“inactive oil wells.”Methane leakage potential aligns with these well types,underscoring the importance of strategic monitoring and mitigation.The analysis notes a zenith in“drilled and completed”wells during 1980-1990.While our study's case analysis and literature review reiterate the critical significance of assessing and mitigating methane emissions from AOG wells,it's important to clarify that the research does not directly provide methane leakage data.Instead,it contextualizes the issue's magnitude and emphasizes the well type and status analysis's role in targeted mitigation efforts.In summary,our research deepens our understanding of methane leakage,aiding informed decision-making and policy formulation for environmental preservation.By clarifying well type implications and historical drilling patterns,we aim to contribute to effective strategies in mitigating methane emissions from AOG wells.展开更多
To meet the requirements of strict fuel consumption and emission limits,continuously increasing the thermal efficiency of an internal combustion engine and decreasing its exhaust emissions are the main challenges to i...To meet the requirements of strict fuel consumption and emission limits,continuously increasing the thermal efficiency of an internal combustion engine and decreasing its exhaust emissions are the main challenges to its sustainable development within the automotive industry.Considering the competition with other zero-emission powertrain systems,such as vehicle batteries and fuel cells,the development of the internal combustion engine needs to focus on producing higher efficiency and zero emissions to meet the request of CO_(2) reduction.This paper introduces two novel concepts for an internal combustion engine featuring high efficiency and zero emissions.Referred to as the argon power cycle engine fueled with either hydrogen or natural gas within an oxygen–argon mixture,its fundamentals and characteristics are expounded.This includes a method necessary to absorb carbon dioxide when natural gas is used as fuel instead of hydrogen.展开更多
An introduction is given in detail about the current situation of Japanese foundry industry in 2006 from aspects such as the delivery structure of castings,scale and numbers of foundries,current profit of foundry indu...An introduction is given in detail about the current situation of Japanese foundry industry in 2006 from aspects such as the delivery structure of castings,scale and numbers of foundries,current profit of foundry industry as well as the background of lower profitability,etc.The development trend of Japanese foundry industry was also predicted,such as the transition of foundries from family business to modern company business,the improvement of rejection ratio and yield,application of IT to production and management,human resources and the challenge for zero emission and so on.展开更多
The latest effective utilization of bamboo resources is changing from domestic industry to mechanical industry. This fact will be required a lot of raw material from a large scale factory, therefore, what kind of bamb...The latest effective utilization of bamboo resources is changing from domestic industry to mechanical industry. This fact will be required a lot of raw material from a large scale factory, therefore, what kind of bamboo should be selected for a material. So, this study discussed on this matter through investigation and experiment. Results of this study are as follows： 1） Characteristics of bamboo different from trees and grass; 2） Environmental factors： a） annual mean temperature in 10-15 ℃ shows good growth of culm in temperate area and more than 20 ℃ also shows in tropical area, b） Rainfall： more than 1,000 mm year-1 is necessary for growth of culm in temperate and tropical area, and still more in addition to two times of 100 mm month-1 in temperate area, and three times of 200 mm month-l in tropical area, c） Soil and topography： brown colored soil and flat or gentle slope show better growth in temperate area, but red colored soil and slope are not suitable in tropical area, d） Geographical distribution of bamboo related with growth type shown in Figs. 1-3. Productivity of bamboo： annual productivity of bamboo is the biggest compared with other type of vegetation; 4） Selection of two growth type of bamboo： many big bamboos are growing in tropical area; 5） Furthermore items discussed in this report.展开更多
The design and construction of an experimental solar hybrid vehicle based on the combination of photovoltaic solar energy as the main source of electricity and electric power supplied by a generator activated by the d...The design and construction of an experimental solar hybrid vehicle based on the combination of photovoltaic solar energy as the main source of electricity and electric power supplied by a generator activated by the driver＇s pedaling is introduced. The vehicle has a battery to store the energy provided by both systems. The development was motivated by a Latin American solar car race through the Atacama Desert in Chile and the initiative to promote the use of clean energy for transport. A general description of the vehicle, its energetic aspects and experimental results are presented.展开更多
A promising scheme for coal-fired power plants in which biomass co-firing and carbon dioxide capture technologies are adopted and the low-temperature waste heat from the CO_(2) capture process is recycled to heat the ...A promising scheme for coal-fired power plants in which biomass co-firing and carbon dioxide capture technologies are adopted and the low-temperature waste heat from the CO_(2) capture process is recycled to heat the condensed water to achieve zero carbon emission is proposed in this paper.Based on a 660 MW supercritical coal-fired power plant,the thermal performance,emission performance,and economic performance of the proposed scheme are evaluated.In addition,a sensitivity analysis is conducted to show the effects of several key parameters on the performance of the proposed system.The results show that when the biomass mass mixing ratio is 15.40%and the CO_(2) capture rate is 90%,the CO_(2) emission of the coal-fired power plant can reach zero,indicating that the technical route proposed in this paper can indeed achieve zero carbon emission in coal-fired power plants.The net thermal efficiency decreases by 10.31%,due to the huge energy consumption of the CO_(2) capture unit.Besides,the cost of electricity(COE)and the cost of CO_(2) avoided(COA)of the proposed system are 80.37/MWhand41.63/tCO_(2),respectively.The sensitivity analysis demonstrates that with the energy consumption of the reboiler decreasing from 3.22 GJ/tCO_(2) to 2.40 GJ/tCO_(2),the efficiency penalty is reduced to 8.67%.This paper may provide reference for promoting the early realization of carbon neutrality in the power generation industry.展开更多
Energy conversion and utilization, particularly carbon-based fuel burning in air phase, have caused great environmental pollution and serious problems to society. The reactions in water phase may have the potential to...Energy conversion and utilization, particularly carbon-based fuel burning in air phase, have caused great environmental pollution and serious problems to society. The reactions in water phase may have the potential to realize clean and efficient energy conversion and utilization. Coal gasification in supercritical water is a typical carbon-based fuel conversion process in water phase, and it takes the advantages of the unique chemical and physical properties of supercritical water to convert organic matter in coal to H2 and CO2. N, S, P, Hg and other elements are deposited as inorganic salts to avoid pollution emission. The State Key Laboratory of Multiphase Flow in Power Engineering has obtained extensive experimental and theoretical results based on coal gasification in supercritical water. Supercritical water fluidized bed reactor was developed for coal gasification and seven kinds of typical feedstock were selected. The hydrogen yield covers from 0.67 to 1.74 Nm3/kg and the carbon gasification efficiency is no less than 97%. This technology has a bright future in industrialization not only in electricity generation but also in hydrogen production and high value-added chemicals. Given the gas yield obtained in laboratory-scale unit, the hydrogen production cost is U.S.$ 0.111 Nm3 when the throughput capacity is 2000 t/d. A novel thermodynamic cycle power generation system based on coal gasification in supercritical water was proposed with the obvious advantages of high coal-electricity conversion efficiency and zero pollutant emission. The cost of U.S.$ 3.69 billion for desulfuration, denitration and dust removal in China in 2013 would have been saved with this technology. Five kinds of heat supply methods are analyzed and the rates of return of investment are roughly estimated. An integrated cooperative innovation center called a new type of high-efficient coal gasification technology and its large-scale utilization was founded to enhance the industrialization of the technology vigorously.展开更多
Zero energy consumption.The goal sounds simple and is presented excessively in variations all over the world.Energy and environmental politics demand zero consumption as a long-term goal,marketing has discovered the c...Zero energy consumption.The goal sounds simple and is presented excessively in variations all over the world.Energy and environmental politics demand zero consumption as a long-term goal,marketing has discovered the concept and fi rst buildings and settlements aiming at balanced energy or emission budgets have been constructed.As an example,the German Federal Government specifi es in its fi fth energy research programme(2005):For new buildings,the goal is to reduce the primary energy demand,i.e.the energy demand for heating,domestic hot water,ventilation,air-conditioning,lighting and auxiliary energy,again by half compared to the current state of the art.The long-term goal is zero-emission buildings.England and the USA aim for zero carbon developments and net-zero energy buildings(DOE,2009)in political programmes.The Vatican accepted the offer of climatic“indulgence”—and thus became the fi rst country in the world to completely compensate its carbon emission(Spiegel online,2007).Megaprojects in the growth regions of the Arabian Gulf and China advertise with a CO2-neutral balance.A Zero Carbon Community is to be created in Masdar,Abu Dhabi(Foster,2007),and the fi rst Chinese carbon-neutral ecocity was planned for Dongtan,Shanghai(Pearce,2009).Not only to aid international communication,but also to further the processes required to solve energy-related problems,it is essential that key words,central concepts,their usage and their relationships be clarifi ed.This article intends to contribute to this clarifi cation based on the monitored example of a solar estate.Net zero energy building,equilibrium building,carbon neutral city—the accounting method varies,depending on motivation and point of view.If the focus is on fi nite and scarce resources,energy is the currency;CO2-equivalent emissions are considered if global warming and public health is the issue;the cost of energy is what concerns a tenant paying for heating and electricity.A balance in one set of units can be converted to another,but the conversion factors often also shift the balance point.Energy will be used as the reference quantity in the following article,which prevents confusion with non-energy measures(e.g.carbon credits for forestry)and avoids the nuclear power debate,in which nuclear power is partly calculated as being CO2 neutral.The diversity of concepts is an indicator that a scientifi cally based methodology is still lacking,though initial publications focus hereon(Pless et al.2009).Since October 2008,a group of experts in the International Energy Agency has been addressing this issue under the heading,Towards Net Zero Energy Solar Buildings(Riley et al.2008).The goal is to document and analyse outstanding examples that are close to being net zero-energy buildings,and while doing so,to develop the methodology and tools for working with such buildings.The Chair of Technical Building Services,University of Wuppertal,is co-ordinating the methodological work.The zero-energy approach—still under construction—will here be presented using a solar estate as an illustration.展开更多
1 Introduction Climate change represents one of the most significant challenges humanity faces today.Since the First Industrial Revolution,the large-scale use of fossil fuels has spurred the development of human socie...1 Introduction Climate change represents one of the most significant challenges humanity faces today.Since the First Industrial Revolution,the large-scale use of fossil fuels has spurred the development of human society.However,it has also led to severe global warming,threatening human survival and sustainable development.In 2023,the 28th Conference of the Parties(COP28)to the United Nations Framework Convention on Climate Change(UNFCCC)in Dubai reached an agreement on establishing a roadmap for the“transitioning away from fossil fuels,”marking what is regarded as“the beginning of the end of fossil fuels”[1].Currently,over 150 countries worldwide have announced plans to achieve net-zero carbon emissions or carbon neutrality by around 2050.展开更多
Agriculture and forestry on drained peatlands contribute substantial amounts of anthropogenic greenhouse gas emissions.The transformation of peatland management toward“wet”land use takes on an increasingly critical ...Agriculture and forestry on drained peatlands contribute substantial amounts of anthropogenic greenhouse gas emissions.The transformation of peatland management toward“wet”land use takes on an increasingly critical role in achieving zero net carbon emissions by 2050.Yet,the translation of European Union climate target ambitions into peatland relevancy on emission reduction remains unclear.The study presents an analysis of the current status and future pathways of peatland transformation in European countries.Our data are collected by a survey with 60 experts in 8 countries and a workshop with 16 experts in 3 countries.The analysis shows expected trends for drained peatlands,indicating a shift from drainage-based cropland to grassland or wetland use.Although these trends support emission reduction,nations with lucrative peatland areas are likely to resist shifting to less profitable land uses.Three categories of management practices were identified based on water level.Among them,grassland paludiculture and grassland with elevated water tables are appreciated by experts.The transition pathways for Finland,Germany,and the Netherlands reflect the consensus that peatland emissions have to be reduced drastically.However,differences in soil types,geoclimatic zones,and diverse management approaches among countries pose a challenge when assessing and implementing the potential of mitigation.Experts highlighted the desirability and feasibility of spatial coordination to align the interests of land managers.Similar hurdles appear for the transition pathways,especially missing economic incentives.The transition demands wider public support,financial action,and reconciling differing stakeholder interests along transparent and stringent pathways.展开更多
Developing efficient CO_(2)utilization technologies can alleviate the urgent pressure on energy and the environment.Moreover,these technologies are crucial for achieving the goal of net zero emissions.Microalgae are p...Developing efficient CO_(2)utilization technologies can alleviate the urgent pressure on energy and the environment.Moreover,these technologies are crucial for achieving the goal of net zero emissions.Microalgae are photoautotrophic microorganisms that are the main sources of primary productivity in the biosphere.Cyanobacteria,the only prokaryotic microalgae,have also been considered as promising chassis for photosynthetic biosynthesis,directly converting solar energy and CO_(2)into various bio-based products.This technological route is called photosynthetic biomanufacturing,and is advantageous to simultaneous carbon fixation and clean production.This review focuses on development mode,application and suggests trends related to the further development of photosynthetic biomanufacturing.With regard to the link between photosynthetic CO_(2)fixation and the production of desired metabolites,we summarized and compared three widely adopted strategies.“Screening to find”,screening a large number of high-quality cyanobacterial resources and analyzing their intracellular metabolites are of significance for screening novel cyanobacterial species with high-value chemicals and properties of industrial relevance.“Engineering to modify”,the emergence and application of synthetic biological tools and metabolic engineering strategies have enhanced the ability to modify different cyanobacterial species to reshape more carbon to flow toward synthetic tailored chemicals.“Stressing to activate”,through special culture conditions and strategies,combined with omics analysis techniques,silent metabolic pathways and functional modules are activated to induce the accumulation of high-value chemicals.This review provides valid and updated information to facilitate the development of photosynthetic biosynthesis route with carbon fixation and clean production,providing specific feasible solutions for net zero emissions.展开更多
Research topics and methods of green chemistry in chromate production are introduced in this paper. New original green chemical process of the heterogeneous reaction and separation system of liquid phase oxidation of ...Research topics and methods of green chemistry in chromate production are introduced in this paper. New original green chemical process of the heterogeneous reaction and separation system of liquid phase oxidation of chromite in molten salt of sodium hydroxide—one way separation in high concentration medium—metastable phase separation—carbonate recycle conversion has been developed. The green commercial process for comprehensive utilization of mineral resources—reactant recycle inside the process—zero emission was established.展开更多
We propose a new international monetary system based on carbon currency(the carbon standard)to tackle two pressing externalities in today’s global economic and political context:the dangerous and irreversible effects...We propose a new international monetary system based on carbon currency(the carbon standard)to tackle two pressing externalities in today’s global economic and political context:the dangerous and irreversible effects caused by unconstrained green-house gas emissions and the cost to the rest of the world as a result of the U.S.dollar being the dominated global currency and the U.S.Federal Reserve increasingly implementing monetary policies not aligned with the global common interest.We define carbon currency as standardized carbon-related securities backed up by the right of one unit of carbon emissions.It can be used as a new global reserve currency and functions as an international unit of account.Through the trading of carbon currency,efficient carbon prices are established.By incorporating the cost of carbon emissions into decision making,carbon pricing provides incentives for countries to pursue low-carbon growth,which helps achieve the net zero emissions global goal set under the 2015 Paris Agreement.Under the carbon standard,the external shocks to the international financial system would come from variations of carbon emissions rather than the U.S.monetary policies.As such,monetary authorities’commitment to maintaining stable exchange rates comes together with monetary policies aiming at pursuing low-carbon growth.The new system potentially poses a plausible solution to the classical Mundellian Trilemma because the objectives of maintaining fixed exchange rate and implementing monetary policy become one.Although several hurdles are constraining the launch of carbon currency immediately,the carbon standard poses a feasible international monetary system as the world-wide campaign to achieve carbon neutrality progresses.展开更多
文摘This study investigates the impact of carbon tax policies on carbon emission reductions in G20 countries to support the achievement of the Net Zero Emissions target by 2060.As the G20 collectively accounts for a significant share of global greenhouse gas emissions,effective policy interventions in these nations are pivotal to addressing the climate crisis.The research employs the Pearson correlation test to quantify the statistical relationship between carbon tax rates and emission levels,alongside a content analysis of sustainability reports from G20 countries to evaluate policy implementation and outcomes.The results reveal a moderate yet statistically significant negative correlation(r=-0.30,p<0.05),indicating that higher carbon taxes are associated with lower emission levels.Content analysis further demonstrates that countries with high and consistently enforced carbon taxes,such as Japan and South Korea,achieve more substantial emissions reductions compared to nations with lower tax rates or inconsistent policy implementation.The findings emphasize that while carbon taxes serve as an effective instrument to internalize the social costs of carbon pollution,their impact is maximized when integrated with broader strategies,including investments in renewable energy,advancements in energy efficiency,and technological innovation.This research contributes to the understanding of carbon tax effectiveness and offers policy recommendations to strengthen fiscal measures as part of comprehensive climate action strategies toward achieving global sustainability targets.
基金This research is supported by the German Federal Ministry of Education and Research(BMBF)through the research project grant no.01LN1713A.Any opinions,findings,conclusions and recommendations in the document are those of the authors and do not necessarily reflect the view of the BMBF.
文摘Coal and carbon-containing waste are valuable primary and secondary carbon carriers.In the current dominant linear economy,such carbon resources are generally combusted to produce electricity and heat and as a way to resolve a nation’s waste issue.Not only is this a wastage of precious carbon resources,which can be chemically utilized as raw materials for production of other value-added goods,it is also contrary to international efforts to reduce carbon emissions and increase resource efficiency and conservation.This article presents a concept to support the transformation from a linear‘one-way cradle to grave manufacturing model’toward a circular carbon economy.The development of new and sustainable value chains through the utilization of coal and waste as alternative raw materials for the chemical industry via a coupling of the energy,chemical and waste management sectors offers a viable and future-oriented perspective for closing the carbon cycle.Further benefits also include a lowering of the carbon footprint and increasing resource efficiency and conservation of primary carbon resources.In addition,technological innovations and developments that are necessary to support a successful sector coupling will be identified.To illustrate our concept,a case analysis of domestic coal and waste as alternative feedstock to imported crude oil for chemical production in Germany will be presented.Last but not least,challenges posed by path dependency along technological,institutional and human dimensions in the sociotechnical system for a successful transition toward a circular carbon economy will be discussed.
文摘Decrease of energy consumption in buildings and increase of the share of renewable energies in them are currently technologically and economically feasible and it is promoted by E.U. policies. After 2019, all the new public buildings in EU countries must be near zero energy buildings reducing their energy consumption and CO<sub>2</sub> emissions. Use of various renewable energies for heat and power generation in school buildings in Crete-Greece can result in zeroing their fossil fuels consumption and CO<sub>2</sub> emissions. Purpose of the current work is to investigate the possibilities of creating zero CO<sub>2</sub> emissions school buildings in Crete-Greece due to operational energy use in them. A methodology which allows the replacement of fossil fuels with renewable energies in school buildings is proposed. Solar energy, solid biomass and low enthalpy geothermal energy, which are abundant in Crete, can be used for that. School buildings in Greece consume significantly less energy, 68 KWh/m<sup>2</sup> year, and emit less CO<sub>2</sub>, 28 kgCO<sub>2</sub>/m<sup>2</sup> year, than the corresponding buildings in other countries. The installation cost of renewable energies systems in order to replace all fossil fuels used in school buildings in Crete-Greece and to zero their CO<sub>2</sub> consumption due to energy use in them has been estimated at 47.42 - 87.71 €/m<sup>2</sup>, which corresponds to 1.69 - 3.13 €/kg CO<sub>2</sub> saved.
基金supported by the funding of Belt and Road Research Institute,Xiamen University(No:1500-X2101200)National Natural Science Foundation of China(Key Program,No:72133003).
文摘The Conference of the Parties(COP26 and 27)placed significant emphasis on climate financing policies with the objective of achieving net zero emissions and carbon neutrality.However,studies on the implementation of this policy proposition are limited.To address this gap in the literature,this study employs machine learning techniques,specifically natural language processing(NLP),to examine 77 climate bond(CB)policies from 32 countries within the context of climate financing.The findings indicate that“sustainability”and“carbon emissions control”are the most outlined policy objectives in these CB policies.Additionally,the study highlights that most CB funds are invested toward energy projects(i.e.,renewable,clean,and efficient initiatives).However,there has been a notable shift in the allocation of CB funds from climate-friendly energy projects to the construction sector between 2015 and 2019.This shift raises concerns about the potential redirection of funds from climate-focused investments to the real estate industry,potentially leading to the greenwashing of climate funds.Furthermore,policy sentiment analysis revealed that a minority of policies hold skeptical views on climate change,which may negatively influence climate actions.Thus,the findings highlight that the effective implementation of CB policies depends on policy goals,objectives,and sentiments.Finally,this study contributes to the literature by employing NLP techniques to understand policy sentiments in climate financing.
文摘On June 5,2025,with the theme“Co-drive Sustainable Journey,Cocreate for Shared Success”,BASF participates in the 2025 Shanghai International Carbon Neutrality Expo in Technologies,Products and Achievements(CNE).Through three sections titled“renewable energy”,“alternative raw materials”,and“new technologies”,BASF presents its latest progress towards its goal of net-zero greenhouse gas emissions by 2050,along with its innovative low-carbon technologies and co-creations with its partners.
文摘From the perspective of water resources, coal chemical enterprises should pay attention to the recycling and economical utilization of water resources in the front-end stage of supply and use, so as to reduce the pressure of end water treatment, so as to control the utilization and treatment cost of water.With the rapid development of coal chemical industry, the realization of zero discharge of coal chemical wastewater has become a focus.In the treatment of coal chemical wastewater, effective measures should be taken to reduce and reuse pollutants, effectively improve resource utilization and seek the road of sustainable development.
文摘Petroleum has played a vital role as the major supplier of materials and energy during the evolution of human civilization.Given the change in demand for energy from high to low carbon and ultimately net zero carbon,the energy framework has undergone revolutionary changes.The energy attribute of petroleum will be gradually weakened,while the material and CO_(2)emission attributes will be gradually strengthened.Thus,the petrochemical processing basis,scientific concepts,and ideas will undergo major adjustments to reshape the petrochemical industry.Hence,it is necessary to reconsider the evolution of the petrochemical industry from a historical perspective and to clarify the historical causes,development contexts,and possible challenges in future development.Herein,we critically reassess the key drivers and rules guiding the development of the petrochemical industry and propose a reconstruction strategy based on simplified engineering thinking,innate nature of energy and material,and CO_(2)emissions,which can be realized through the integration of gasification with CO as the target product and recent C1 chemistry targeting the precise synthesis of chemicals.The concept of the petrochemical industry will change from the product-based process of selection and transformation of raw material molecules to the process of carbon atom reconfiguration driven by product CO_(2)emissions.More accurate management of C atoms can be accomplished with greatly improved utilization efficiency and the reduction of separation intensity and CO_(2)emissions via the stepwise introduction of a new approach in the current petrochemical industry.
文摘In the pursuit of global net zero carbon emissions and climate change mitigation,ongoing research into sustainable energy sources and emission control is paramount.This review examines methane leakage from abandoned oil and gas(AOG)wells,focusing particularly on Lubbock,a geographic area situated within the larger region known as the Permian Basin in West Texas,United States.The objective is to assess the extent and environmental implications of methane leakage from these wells.The analysis integrates pertinent literature,governmental and industry data,and prior Lubbock reports.Factors affecting methane leakage,including well integrity,geological characteristics,and human activities,are explored.Our research estimates 1781 drilled wells in Lubbock,forming a foundation for targeted assessments and monitoring due to historical drilling trends.The hierarchy of well statuses in Lubbock highlights the prevalence of“active oil wells,”trailed by“plugged and abandoned oil wells”and“inactive oil wells.”Methane leakage potential aligns with these well types,underscoring the importance of strategic monitoring and mitigation.The analysis notes a zenith in“drilled and completed”wells during 1980-1990.While our study's case analysis and literature review reiterate the critical significance of assessing and mitigating methane emissions from AOG wells,it's important to clarify that the research does not directly provide methane leakage data.Instead,it contextualizes the issue's magnitude and emphasizes the well type and status analysis's role in targeted mitigation efforts.In summary,our research deepens our understanding of methane leakage,aiding informed decision-making and policy formulation for environmental preservation.By clarifying well type implications and historical drilling patterns,we aim to contribute to effective strategies in mitigating methane emissions from AOG wells.
基金The authors thank the National Natural Science Foundation of China(51576164)R&D Center of FAW and CDHK KSPG Professorship Chair Funds on Argon Power Cycle Engine Stud-ies.
文摘To meet the requirements of strict fuel consumption and emission limits,continuously increasing the thermal efficiency of an internal combustion engine and decreasing its exhaust emissions are the main challenges to its sustainable development within the automotive industry.Considering the competition with other zero-emission powertrain systems,such as vehicle batteries and fuel cells,the development of the internal combustion engine needs to focus on producing higher efficiency and zero emissions to meet the request of CO_(2) reduction.This paper introduces two novel concepts for an internal combustion engine featuring high efficiency and zero emissions.Referred to as the argon power cycle engine fueled with either hydrogen or natural gas within an oxygen–argon mixture,its fundamentals and characteristics are expounded.This includes a method necessary to absorb carbon dioxide when natural gas is used as fuel instead of hydrogen.
文摘An introduction is given in detail about the current situation of Japanese foundry industry in 2006 from aspects such as the delivery structure of castings,scale and numbers of foundries,current profit of foundry industry as well as the background of lower profitability,etc.The development trend of Japanese foundry industry was also predicted,such as the transition of foundries from family business to modern company business,the improvement of rejection ratio and yield,application of IT to production and management,human resources and the challenge for zero emission and so on.
文摘The latest effective utilization of bamboo resources is changing from domestic industry to mechanical industry. This fact will be required a lot of raw material from a large scale factory, therefore, what kind of bamboo should be selected for a material. So, this study discussed on this matter through investigation and experiment. Results of this study are as follows： 1） Characteristics of bamboo different from trees and grass; 2） Environmental factors： a） annual mean temperature in 10-15 ℃ shows good growth of culm in temperate area and more than 20 ℃ also shows in tropical area, b） Rainfall： more than 1,000 mm year-1 is necessary for growth of culm in temperate and tropical area, and still more in addition to two times of 100 mm month-1 in temperate area, and three times of 200 mm month-l in tropical area, c） Soil and topography： brown colored soil and flat or gentle slope show better growth in temperate area, but red colored soil and slope are not suitable in tropical area, d） Geographical distribution of bamboo related with growth type shown in Figs. 1-3. Productivity of bamboo： annual productivity of bamboo is the biggest compared with other type of vegetation; 4） Selection of two growth type of bamboo： many big bamboos are growing in tropical area; 5） Furthermore items discussed in this report.
文摘The design and construction of an experimental solar hybrid vehicle based on the combination of photovoltaic solar energy as the main source of electricity and electric power supplied by a generator activated by the driver＇s pedaling is introduced. The vehicle has a battery to store the energy provided by both systems. The development was motivated by a Latin American solar car race through the Atacama Desert in Chile and the initiative to promote the use of clean energy for transport. A general description of the vehicle, its energetic aspects and experimental results are presented.
基金supported by the National Natural Science Foundation of China(Grant No.51806062)the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(Grant No.51821004)the Fundamental Research Funds for the Central Universities(Grant No.2020MS006).
文摘A promising scheme for coal-fired power plants in which biomass co-firing and carbon dioxide capture technologies are adopted and the low-temperature waste heat from the CO_(2) capture process is recycled to heat the condensed water to achieve zero carbon emission is proposed in this paper.Based on a 660 MW supercritical coal-fired power plant,the thermal performance,emission performance,and economic performance of the proposed scheme are evaluated.In addition,a sensitivity analysis is conducted to show the effects of several key parameters on the performance of the proposed system.The results show that when the biomass mass mixing ratio is 15.40%and the CO_(2) capture rate is 90%,the CO_(2) emission of the coal-fired power plant can reach zero,indicating that the technical route proposed in this paper can indeed achieve zero carbon emission in coal-fired power plants.The net thermal efficiency decreases by 10.31%,due to the huge energy consumption of the CO_(2) capture unit.Besides,the cost of electricity(COE)and the cost of CO_(2) avoided(COA)of the proposed system are 80.37/MWhand41.63/tCO_(2),respectively.The sensitivity analysis demonstrates that with the energy consumption of the reboiler decreasing from 3.22 GJ/tCO_(2) to 2.40 GJ/tCO_(2),the efficiency penalty is reduced to 8.67%.This paper may provide reference for promoting the early realization of carbon neutrality in the power generation industry.
基金supported by the National Natural Science Foundation of China(Grant Nos.5132301151306145&51236007)
文摘Energy conversion and utilization, particularly carbon-based fuel burning in air phase, have caused great environmental pollution and serious problems to society. The reactions in water phase may have the potential to realize clean and efficient energy conversion and utilization. Coal gasification in supercritical water is a typical carbon-based fuel conversion process in water phase, and it takes the advantages of the unique chemical and physical properties of supercritical water to convert organic matter in coal to H2 and CO2. N, S, P, Hg and other elements are deposited as inorganic salts to avoid pollution emission. The State Key Laboratory of Multiphase Flow in Power Engineering has obtained extensive experimental and theoretical results based on coal gasification in supercritical water. Supercritical water fluidized bed reactor was developed for coal gasification and seven kinds of typical feedstock were selected. The hydrogen yield covers from 0.67 to 1.74 Nm3/kg and the carbon gasification efficiency is no less than 97%. This technology has a bright future in industrialization not only in electricity generation but also in hydrogen production and high value-added chemicals. Given the gas yield obtained in laboratory-scale unit, the hydrogen production cost is U.S.$ 0.111 Nm3 when the throughput capacity is 2000 t/d. A novel thermodynamic cycle power generation system based on coal gasification in supercritical water was proposed with the obvious advantages of high coal-electricity conversion efficiency and zero pollutant emission. The cost of U.S.$ 3.69 billion for desulfuration, denitration and dust removal in China in 2013 would have been saved with this technology. Five kinds of heat supply methods are analyzed and the rates of return of investment are roughly estimated. An integrated cooperative innovation center called a new type of high-efficient coal gasification technology and its large-scale utilization was founded to enhance the industrialization of the technology vigorously.
文摘Zero energy consumption.The goal sounds simple and is presented excessively in variations all over the world.Energy and environmental politics demand zero consumption as a long-term goal,marketing has discovered the concept and fi rst buildings and settlements aiming at balanced energy or emission budgets have been constructed.As an example,the German Federal Government specifi es in its fi fth energy research programme(2005):For new buildings,the goal is to reduce the primary energy demand,i.e.the energy demand for heating,domestic hot water,ventilation,air-conditioning,lighting and auxiliary energy,again by half compared to the current state of the art.The long-term goal is zero-emission buildings.England and the USA aim for zero carbon developments and net-zero energy buildings(DOE,2009)in political programmes.The Vatican accepted the offer of climatic“indulgence”—and thus became the fi rst country in the world to completely compensate its carbon emission(Spiegel online,2007).Megaprojects in the growth regions of the Arabian Gulf and China advertise with a CO2-neutral balance.A Zero Carbon Community is to be created in Masdar,Abu Dhabi(Foster,2007),and the fi rst Chinese carbon-neutral ecocity was planned for Dongtan,Shanghai(Pearce,2009).Not only to aid international communication,but also to further the processes required to solve energy-related problems,it is essential that key words,central concepts,their usage and their relationships be clarifi ed.This article intends to contribute to this clarifi cation based on the monitored example of a solar estate.Net zero energy building,equilibrium building,carbon neutral city—the accounting method varies,depending on motivation and point of view.If the focus is on fi nite and scarce resources,energy is the currency;CO2-equivalent emissions are considered if global warming and public health is the issue;the cost of energy is what concerns a tenant paying for heating and electricity.A balance in one set of units can be converted to another,but the conversion factors often also shift the balance point.Energy will be used as the reference quantity in the following article,which prevents confusion with non-energy measures(e.g.carbon credits for forestry)and avoids the nuclear power debate,in which nuclear power is partly calculated as being CO2 neutral.The diversity of concepts is an indicator that a scientifi cally based methodology is still lacking,though initial publications focus hereon(Pless et al.2009).Since October 2008,a group of experts in the International Energy Agency has been addressing this issue under the heading,Towards Net Zero Energy Solar Buildings(Riley et al.2008).The goal is to document and analyse outstanding examples that are close to being net zero-energy buildings,and while doing so,to develop the methodology and tools for working with such buildings.The Chair of Technical Building Services,University of Wuppertal,is co-ordinating the methodological work.The zero-energy approach—still under construction—will here be presented using a solar estate as an illustration.
文摘1 Introduction Climate change represents one of the most significant challenges humanity faces today.Since the First Industrial Revolution,the large-scale use of fossil fuels has spurred the development of human society.However,it has also led to severe global warming,threatening human survival and sustainable development.In 2023,the 28th Conference of the Parties(COP28)to the United Nations Framework Convention on Climate Change(UNFCCC)in Dubai reached an agreement on establishing a roadmap for the“transitioning away from fossil fuels,”marking what is regarded as“the beginning of the end of fossil fuels”[1].Currently,over 150 countries worldwide have announced plans to achieve net-zero carbon emissions or carbon neutrality by around 2050.
基金in part through funding by the PEATWISE project(https://www.eragas.eu/en/eragas/research-projects/peatwise.htm)under the FACCE ERA-GAS Research Programme(under the European Union’s Horizon 2020 Research&Innovation Programme,grant agreement no.696356)the support of the Wet Net BB project(Management and Biomass Utilization of Wet Fens:Network of Model and Demonstration Projects in Peatland Regions of Brandenburg),funded by the Federal Ministry of Food and Agriculture through the Climate and Transformation Fund
文摘Agriculture and forestry on drained peatlands contribute substantial amounts of anthropogenic greenhouse gas emissions.The transformation of peatland management toward“wet”land use takes on an increasingly critical role in achieving zero net carbon emissions by 2050.Yet,the translation of European Union climate target ambitions into peatland relevancy on emission reduction remains unclear.The study presents an analysis of the current status and future pathways of peatland transformation in European countries.Our data are collected by a survey with 60 experts in 8 countries and a workshop with 16 experts in 3 countries.The analysis shows expected trends for drained peatlands,indicating a shift from drainage-based cropland to grassland or wetland use.Although these trends support emission reduction,nations with lucrative peatland areas are likely to resist shifting to less profitable land uses.Three categories of management practices were identified based on water level.Among them,grassland paludiculture and grassland with elevated water tables are appreciated by experts.The transition pathways for Finland,Germany,and the Netherlands reflect the consensus that peatland emissions have to be reduced drastically.However,differences in soil types,geoclimatic zones,and diverse management approaches among countries pose a challenge when assessing and implementing the potential of mitigation.Experts highlighted the desirability and feasibility of spatial coordination to align the interests of land managers.Similar hurdles appear for the transition pathways,especially missing economic incentives.The transition demands wider public support,financial action,and reconciling differing stakeholder interests along transparent and stringent pathways.
基金supported by the National Key Research and Development Program of China(Grant number 2021YFA0909700,to X.L.and G.L.)the Youth Innovation Promotion Association CAS(to G.L.)+2 种基金the National Natural Science Foundation of China(Grant number 32070084 to G.L.,32270103 to G.L.,32271484 to X.L.,32300058 to J.C.)the DNL Cooperation Fund,CAS(DNL202014,to G.L.)the Shandong Taishan Scholarship(to X.L.and G.L.).
文摘Developing efficient CO_(2)utilization technologies can alleviate the urgent pressure on energy and the environment.Moreover,these technologies are crucial for achieving the goal of net zero emissions.Microalgae are photoautotrophic microorganisms that are the main sources of primary productivity in the biosphere.Cyanobacteria,the only prokaryotic microalgae,have also been considered as promising chassis for photosynthetic biosynthesis,directly converting solar energy and CO_(2)into various bio-based products.This technological route is called photosynthetic biomanufacturing,and is advantageous to simultaneous carbon fixation and clean production.This review focuses on development mode,application and suggests trends related to the further development of photosynthetic biomanufacturing.With regard to the link between photosynthetic CO_(2)fixation and the production of desired metabolites,we summarized and compared three widely adopted strategies.“Screening to find”,screening a large number of high-quality cyanobacterial resources and analyzing their intracellular metabolites are of significance for screening novel cyanobacterial species with high-value chemicals and properties of industrial relevance.“Engineering to modify”,the emergence and application of synthetic biological tools and metabolic engineering strategies have enhanced the ability to modify different cyanobacterial species to reshape more carbon to flow toward synthetic tailored chemicals.“Stressing to activate”,through special culture conditions and strategies,combined with omics analysis techniques,silent metabolic pathways and functional modules are activated to induce the accumulation of high-value chemicals.This review provides valid and updated information to facilitate the development of photosynthetic biosynthesis route with carbon fixation and clean production,providing specific feasible solutions for net zero emissions.
基金Special article from the First International Workshop on Green Chemistry, the University of ScienceTechnology of China, Hefei, China, May, 1998.+1 种基金Project supported by Chinese Academy of Sciences (No.KZ95T-05)the National Natural Science Foundation of
文摘Research topics and methods of green chemistry in chromate production are introduced in this paper. New original green chemical process of the heterogeneous reaction and separation system of liquid phase oxidation of chromite in molten salt of sodium hydroxide—one way separation in high concentration medium—metastable phase separation—carbonate recycle conversion has been developed. The green commercial process for comprehensive utilization of mineral resources—reactant recycle inside the process—zero emission was established.
基金This work was supported by grants from the National Natural Science Foundation of China(Grant No.75010005)the China Education Ministry’s Chang Jiang Scholars Program.We thank Carole Gao for her able assistance.
文摘We propose a new international monetary system based on carbon currency(the carbon standard)to tackle two pressing externalities in today’s global economic and political context:the dangerous and irreversible effects caused by unconstrained green-house gas emissions and the cost to the rest of the world as a result of the U.S.dollar being the dominated global currency and the U.S.Federal Reserve increasingly implementing monetary policies not aligned with the global common interest.We define carbon currency as standardized carbon-related securities backed up by the right of one unit of carbon emissions.It can be used as a new global reserve currency and functions as an international unit of account.Through the trading of carbon currency,efficient carbon prices are established.By incorporating the cost of carbon emissions into decision making,carbon pricing provides incentives for countries to pursue low-carbon growth,which helps achieve the net zero emissions global goal set under the 2015 Paris Agreement.Under the carbon standard,the external shocks to the international financial system would come from variations of carbon emissions rather than the U.S.monetary policies.As such,monetary authorities’commitment to maintaining stable exchange rates comes together with monetary policies aiming at pursuing low-carbon growth.The new system potentially poses a plausible solution to the classical Mundellian Trilemma because the objectives of maintaining fixed exchange rate and implementing monetary policy become one.Although several hurdles are constraining the launch of carbon currency immediately,the carbon standard poses a feasible international monetary system as the world-wide campaign to achieve carbon neutrality progresses.
