Waste is the bridge linking resource consumption and greenhouse gas generation,and waste landfills are the main anthropogenic source of methane(CH_(4)).The United States(US)-China Joint Glasgow Declaration and the Glo...Waste is the bridge linking resource consumption and greenhouse gas generation,and waste landfills are the main anthropogenic source of methane(CH_(4)).The United States(US)-China Joint Glasgow Declaration and the Global Methane Pledge are committed to reducing tractable CH_(4)emissions;however,differences between the involved countries as well as their generation forecast processes have hampered cooperation.In this study,we provide a deep insight into CH_(4)emissions from municipal solid waste(MSW)landfills and identify the disparities in CH_(4)emissions with local socio-economic conditions.The US and China,the world’s two largest economies,generated approximately 3.73 and 1.48 million tonnes of CH_(4)from 1248 to 1955 landfills in 2012 using the FOD/bottom-up method,with corresponding 26.93 and 11.94 kg per tonne waste and emission value from each landfill ranging between 100 and 105 and 10^(−5)-10^(5)tonnes.The spatial distribution was also quantified and compared with national,state/province,and urban agglomeration perspectives based on historical MSW variations(1990-2015)to clarify the triangular relationship between the economic situation,waste properties,and landfill CH_(4)emissions.High-density CH_(4)emission regions spatially overlapped with highly developed urban agglomerations,positively correlated with the local gross domestic product(GDP)and population(p<0.01),with more emissions generated per thousand US dollars in the US(0.25 tonnes)than in China(0.16 tonnes).The US tertiary industry and China’s secondary industry contributed to high CH_(4)emissions from the waste sector.The increase in tertiary industry might reduce the waste sector’s CH_(4)emissions.This study will help to understand this new triangular relationship and predict future patterns of CH_(4)emissions.展开更多
基金supported by the National Natural Science Foundation of China(42077111,72088101,71810107001)the National Key R&D Program of China(2018YFC1900704)+2 种基金State Administration of Foreign Experts project(G2022037007L)Shanghai Ecological Environmental Protection Agency([2021]48)the Technology innovation and development project of the Inner Mongolia Institute of Shanghai Jiao Tong University(2021PT0045-02-01).
文摘Waste is the bridge linking resource consumption and greenhouse gas generation,and waste landfills are the main anthropogenic source of methane(CH_(4)).The United States(US)-China Joint Glasgow Declaration and the Global Methane Pledge are committed to reducing tractable CH_(4)emissions;however,differences between the involved countries as well as their generation forecast processes have hampered cooperation.In this study,we provide a deep insight into CH_(4)emissions from municipal solid waste(MSW)landfills and identify the disparities in CH_(4)emissions with local socio-economic conditions.The US and China,the world’s two largest economies,generated approximately 3.73 and 1.48 million tonnes of CH_(4)from 1248 to 1955 landfills in 2012 using the FOD/bottom-up method,with corresponding 26.93 and 11.94 kg per tonne waste and emission value from each landfill ranging between 100 and 105 and 10^(−5)-10^(5)tonnes.The spatial distribution was also quantified and compared with national,state/province,and urban agglomeration perspectives based on historical MSW variations(1990-2015)to clarify the triangular relationship between the economic situation,waste properties,and landfill CH_(4)emissions.High-density CH_(4)emission regions spatially overlapped with highly developed urban agglomerations,positively correlated with the local gross domestic product(GDP)and population(p<0.01),with more emissions generated per thousand US dollars in the US(0.25 tonnes)than in China(0.16 tonnes).The US tertiary industry and China’s secondary industry contributed to high CH_(4)emissions from the waste sector.The increase in tertiary industry might reduce the waste sector’s CH_(4)emissions.This study will help to understand this new triangular relationship and predict future patterns of CH_(4)emissions.
