The United States should take part of the blame for runaway oil prices Crude oil futures breached the psychological benchmark of $100 a barrel at the beginning of 2008.Given the world’s declin- ing oil reserves and g...The United States should take part of the blame for runaway oil prices Crude oil futures breached the psychological benchmark of $100 a barrel at the beginning of 2008.Given the world’s declin- ing oil reserves and growing oil demand in developing countries,oil prices will remain high for a long period to come.展开更多
Ukraine,as one of the world’s largest agricultural producers and exporters,plays a critical role in global food security.It is essential to understand the spatiotemporal dynamics and drivers of productive cropland in...Ukraine,as one of the world’s largest agricultural producers and exporters,plays a critical role in global food security.It is essential to understand the spatiotemporal dynamics and drivers of productive cropland in Ukraine,particularly in the context of the 2022 Russia-Ukraine conflict.We provide the first comprehensive assessment of both conflict-and non-conflict-related factors that influenced the distribution and productivity of Ukraine’s cropland from 2013 to 2023.In addition,we propose a novel method using machine learning models to isolate the impact of conflict on cropland.Our findings reveal that,prior to the conflict,the spatial pattern of Ukraine’s mean cultivation rate was primarily shaped by natural factors—such as climate,soil properties,and elevation—whereas socio-economic factors(e.g.,GDP and population size)exerted a weaker influence.Interannual dynamics in productive cropland area were largely driven by climate variability.The onset of conflict in 2022 dramatically altered this landscape,with nearly half of the cropland grid cells experiencing a conflict-induced reduction.Notably,almost half of the interannual reduction in productive cropland in 2022 was attributed to climate change.Remarkably,in 2023,the return of displaced populations and favorable climatic conditions in many oblasts contributed to a positive trend in cropland reclamation.Despite this,the total area of productive cropland in 2023 remained below expected levels,due to ongoing conflict and localized droughts.Finally,we highlight the urgent need to adopt a two-pronged approach that addresses both the immediate impacts of conflict and the ongoing threats posed by climate change to ensure the resilience and sustainability of agricultural systems in post-conflict areas.展开更多
China’s role as a key player in shaping global development and trends stood out at the recently concluded World Economic Forum (WEF) annual meeting in Davos, Switzerland.In contrast to the incomprehensible threats is...China’s role as a key player in shaping global development and trends stood out at the recently concluded World Economic Forum (WEF) annual meeting in Davos, Switzerland.In contrast to the incomprehensible threats issued by U.S. President Donald Trump before,during, and after the Forum, China’s Vice Premier He Lifeng addressed the assembly of 65 heads of state and over 1,000 CEOs with a sober,substantive presentation.展开更多
基金江西省自然科学基金项目(编号:20202BAB206075)江西省教育厅科技项目(编号:GJJ201202)江西中医药大学中西医结合一级学科平台(Discipline of Chinese and Western Integrative Medicine,Jiangxi University of Chinese Medicine)。
文摘The United States should take part of the blame for runaway oil prices Crude oil futures breached the psychological benchmark of $100 a barrel at the beginning of 2008.Given the world’s declin- ing oil reserves and growing oil demand in developing countries,oil prices will remain high for a long period to come.
基金supported in part by the National Natural Science Foundation of China(Grants No.41971284 and 42371321)the Key Research and Development Program of Hubei Province(Grant No.2025BAB024).
文摘Ukraine,as one of the world’s largest agricultural producers and exporters,plays a critical role in global food security.It is essential to understand the spatiotemporal dynamics and drivers of productive cropland in Ukraine,particularly in the context of the 2022 Russia-Ukraine conflict.We provide the first comprehensive assessment of both conflict-and non-conflict-related factors that influenced the distribution and productivity of Ukraine’s cropland from 2013 to 2023.In addition,we propose a novel method using machine learning models to isolate the impact of conflict on cropland.Our findings reveal that,prior to the conflict,the spatial pattern of Ukraine’s mean cultivation rate was primarily shaped by natural factors—such as climate,soil properties,and elevation—whereas socio-economic factors(e.g.,GDP and population size)exerted a weaker influence.Interannual dynamics in productive cropland area were largely driven by climate variability.The onset of conflict in 2022 dramatically altered this landscape,with nearly half of the cropland grid cells experiencing a conflict-induced reduction.Notably,almost half of the interannual reduction in productive cropland in 2022 was attributed to climate change.Remarkably,in 2023,the return of displaced populations and favorable climatic conditions in many oblasts contributed to a positive trend in cropland reclamation.Despite this,the total area of productive cropland in 2023 remained below expected levels,due to ongoing conflict and localized droughts.Finally,we highlight the urgent need to adopt a two-pronged approach that addresses both the immediate impacts of conflict and the ongoing threats posed by climate change to ensure the resilience and sustainability of agricultural systems in post-conflict areas.
文摘China’s role as a key player in shaping global development and trends stood out at the recently concluded World Economic Forum (WEF) annual meeting in Davos, Switzerland.In contrast to the incomprehensible threats issued by U.S. President Donald Trump before,during, and after the Forum, China’s Vice Premier He Lifeng addressed the assembly of 65 heads of state and over 1,000 CEOs with a sober,substantive presentation.
