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CO₂ emissions embodied in China–US trade: Input–output analysis based on the emergy/dollar ratio
- Du, Huibin, Guo, Jianghong, Mao, Guozhu, Smith, Alexander M., Wang, Xuxu, Wang, Yuan
- Energy policy 2011 v.39 no.10 pp. 5980-5987
- carbon dioxide, emergy, emissions factor, energy efficiency, exports, greenhouse gas emissions, imports, China, United States
- To gain insight into changes in CO₂ emissions embodied in China–US trade, an input–output analysis based on the emergy/dollar ratio (EDR) is used to estimate embodied CO₂ emissions; a structural decomposition analysis (SDA) is employed to analyze the driving factors for changes in CO₂ emissions embodied in China's exports to the US during 2002–2007. The results of the input–output analysis show that net export of CO₂ emissions increased quickly from 2002 to 2005 but decreased from 2005 to 2007. These trends are due to a reduction in total CO₂ emission intensity, a decrease in the exchange rate, and small imports of embodied CO₂ emissions. The results of the SDA demonstrate that total export volume was the largest driving factor for the increase in embodied CO₂ emissions during 2002–2007, followed by intermediate input structure. Direct CO₂ emissions intensity had a negative effect on changes in embodied CO₂ emissions. The results suggest that China should establish a framework for allocating emission responsibilities, enhance energy efficiency, and improve intermediate input structure.