于桥库区周边农村有机废弃物的无组织排放对水库的TN、TP的贡献率较高,分别占外部输入的44.8%和19.5%,同时也是温室气体排放源。以蓟县姚白庄村为实验基地,利用清洁生产机制(Clean Development Mechanism,CDM)项目,采用有机质厌氧消化...于桥库区周边农村有机废弃物的无组织排放对水库的TN、TP的贡献率较高,分别占外部输入的44.8%和19.5%,同时也是温室气体排放源。以蓟县姚白庄村为实验基地,利用清洁生产机制(Clean Development Mechanism,CDM)项目,采用有机质厌氧消化的工艺,进行了日处理规模为55t的农村生物质能利用工程的效能分析。结果表明,姚白庄区内污染物COD减排量为62.1t·a-1,BOD减排量为27.8t·a-1,NH3-N减排量为37.0t·a-1,TP减排量为1.8t·a-1,TN减排量为15.6t·a-1。根据CO2、CH4和N2O3种温室气体的监测结果,得出该项目可以使农村地区温室气体减排效率提高到68%。展开更多
Based on the total-factor energy efficiency framework,this paper calculates China's industrial energy efficiency and CO2 emissions reduction potential from 2000 to 2009 by utilizing the directional distance functi...Based on the total-factor energy efficiency framework,this paper calculates China's industrial energy efficiency and CO2 emissions reduction potential from 2000 to 2009 by utilizing the directional distance function and data envelopment analysis.The empirical results show that:China's industrial overall energy efficiency is relatively lower while the emis-sions reduction potential is relatively greater,given the optimum production frontier.Significant indus-trial disparities of energy efficiency and emissions reduction potential exist.Energy efficiency and emis-sions reduction potential significantly show different tendencies of industrial dynamic variation.This paper suggests the Chinese government impose differential carbon taxes,flexibly utilize carbon market mecha-nism,strengthen energy-saving technological R&D,promote the utilization of renewable energy,and strengthen environmental supervision and regulation,so as to improve China's industrial energy efficiency and reduce CO2 emissions.展开更多
China is playing an increasing role in global climate change mitigation,and local authorities need more city-specifc information on the emissions trends and patterns when designing low-carbon policies.This study provi...China is playing an increasing role in global climate change mitigation,and local authorities need more city-specifc information on the emissions trends and patterns when designing low-carbon policies.This study provides the most comprehensive COemission inventories of 287 Chinese cities from 2001 to2019.The emission inventories are compiled for 47 economic sectors and include energy-related emissions for 17 types of fossil fuels and process-related emissions from cement production.We further investigate the state of the emission peak in each city and reveal hidden driving forces.The results show that38 cities have proactively peaked their emissions for at least fve years and another 21 cities also have emission decline,but passively.The 38 proactively peaked cities achieved emission decline mainly by effciency improvements and structural changes in energy use,while the 21 passively emission declined cities reduced emissions at the cost of economic recession or population loss.We propose that those passively emission declined cities need to face up to the reasons that caused the emission to decline,and fully exploit the opportunities provided by industrial innovation and green investment brought by low-carbon targets to achieve economic recovery and carbon mitigation goals.Proactively peaked cities need to seek strategies to maintain the downward trend in emissions and avoid an emission rebound and thus provide successful models for cities with still growing emissions to achieve an emission peak.展开更多
文摘于桥库区周边农村有机废弃物的无组织排放对水库的TN、TP的贡献率较高,分别占外部输入的44.8%和19.5%,同时也是温室气体排放源。以蓟县姚白庄村为实验基地,利用清洁生产机制(Clean Development Mechanism,CDM)项目,采用有机质厌氧消化的工艺,进行了日处理规模为55t的农村生物质能利用工程的效能分析。结果表明,姚白庄区内污染物COD减排量为62.1t·a-1,BOD减排量为27.8t·a-1,NH3-N减排量为37.0t·a-1,TP减排量为1.8t·a-1,TN减排量为15.6t·a-1。根据CO2、CH4和N2O3种温室气体的监测结果,得出该项目可以使农村地区温室气体减排效率提高到68%。
文摘Based on the total-factor energy efficiency framework,this paper calculates China's industrial energy efficiency and CO2 emissions reduction potential from 2000 to 2009 by utilizing the directional distance function and data envelopment analysis.The empirical results show that:China's industrial overall energy efficiency is relatively lower while the emis-sions reduction potential is relatively greater,given the optimum production frontier.Significant indus-trial disparities of energy efficiency and emissions reduction potential exist.Energy efficiency and emis-sions reduction potential significantly show different tendencies of industrial dynamic variation.This paper suggests the Chinese government impose differential carbon taxes,flexibly utilize carbon market mecha-nism,strengthen energy-saving technological R&D,promote the utilization of renewable energy,and strengthen environmental supervision and regulation,so as to improve China's industrial energy efficiency and reduce CO2 emissions.
基金supported by the National Natural Science Foundation of China(72140001 and 41921005)Shandong Provincial Science Fund for Excellent Youth Scholars(ZR2021YQ27)+1 种基金the National Social Science Fund of China(21ZDA065)the Natural Environment Research Council(2021GRIP02COP-AQ)。
文摘China is playing an increasing role in global climate change mitigation,and local authorities need more city-specifc information on the emissions trends and patterns when designing low-carbon policies.This study provides the most comprehensive COemission inventories of 287 Chinese cities from 2001 to2019.The emission inventories are compiled for 47 economic sectors and include energy-related emissions for 17 types of fossil fuels and process-related emissions from cement production.We further investigate the state of the emission peak in each city and reveal hidden driving forces.The results show that38 cities have proactively peaked their emissions for at least fve years and another 21 cities also have emission decline,but passively.The 38 proactively peaked cities achieved emission decline mainly by effciency improvements and structural changes in energy use,while the 21 passively emission declined cities reduced emissions at the cost of economic recession or population loss.We propose that those passively emission declined cities need to face up to the reasons that caused the emission to decline,and fully exploit the opportunities provided by industrial innovation and green investment brought by low-carbon targets to achieve economic recovery and carbon mitigation goals.Proactively peaked cities need to seek strategies to maintain the downward trend in emissions and avoid an emission rebound and thus provide successful models for cities with still growing emissions to achieve an emission peak.
