Greenhouse gas mitigation in Chinese agriculture: Distinguishing technical and economic potentials

文献类型： 外文期刊

第一作者： Wang, Wen

作者： Wang, Wen;Guo, Liping;Lin, Erda;Wang, Wen;de Perthuis, Christian;Koslowski, Frank;Moran, Dominic;Nayak, Dali Rani;Smith, Pete;Saetnan, Eli;Ju, Xiaotang;Han, Guodong

作者机构：

关键词： China;Agriculture;Climate change;Greenhouse gas mitigation;Marginal abatement cost curve (MACC)

期刊名称：GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS （ 影响因子：9.523； 五年影响因子：12.481 ）

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年卷期：

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收录情况： SCI

摘要： China is now the world's biggest annual emitter of greenhouse gases with 7467 million tons (Mt) carbon dioxide equivalent (CO_2e) in 2005, with agriculture accounting for 11% of this total. As elsewhere, agricultural emissions mitigation policy in China faces a range of challenges due to the biophysical complexity and heterogeneity of farming systems, as well as other socioeconomic barriers. Existing research has contributed to improving our understanding of the technical potential of mitigation measures in this sector (i.e. what works). But for policy purposes it is important to convert these measures into a feasible economic potential, which provides a perspective on whether agricultural emissions reduction (measures) are low cost relative to mitigation measures and overall potential offered by other sectors of the economy. We develop a bottom-up marginal abatement cost curve (MACC) representing the cost of mitigation measures applicable in addition to business-as-usual agricultural practices. The MACC results demonstrate that while the sector offers a maximum technical potential of 402 MtCO_2e in 2020, a reduction of 135 MtCO_2e is potentially available at zero or negative cost (i.e. a cost saving), and 176 MtCO_2e (approximately 44% of the total) can be abated at a cost below a threshold carbon price ≤￥ 100 (approximately ?12) per tCO_2e. Our findings highlight the relative cost effectiveness of nitrogen fertilizer and manure best management practices, and animal breeding practices. We outline the assumptions underlying MACC construction and discuss some scientific, socioeconomic and institutional barriers to realizing the indicated levels of mitigation.

分类号： X

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