气候变化领域集成服务门户(CCPortal): Use of U.S. croplands for biofuels increases greenhouse gases through emissions from land-use change

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DOI	10.1126/science.1151861
	Use of U.S. croplands for biofuels increases greenhouse gases through emissions from land-use change
	Searchinger T.; Heimlich R.; Houghton R.A.; Dong F.; Elobeid A.; Fabiosa J.; Tokgoz S.; Hayes D.; Yu T.-H.
发表日期	2008
ISSN	0036-8075
起始页码	1238
结束页码	1240
卷号	319 期号:5867
英文摘要	Most prior studies have found that substituting biofuels for gasoline will reduce greenhouse gases because biofuels sequester carbon through the growth of the feedstock. These analyses have failed to count the carbon emissions that occur as farmers worldwide respond to higher prices and convert forest and grassland to new cropland to replace the grain (or cropland) diverted to biofuels. By using a worldwide agricultural model to estimate emissions from land-use change, we found that corn-based ethanol, instead of producing a 20% savings, nearly doubles greenhouse emissions over 30 years and increases greenhouse gases for 167 years. Biofuels from switchgrass, if grown on U.S. corn lands, increase emissions by 50%. This result raises concerns about large biofuel mandates and highlights the value of using waste products.
英文关键词	alcohol; biofuel; gasoline; agricultural modeling; biofuel; biomass; emission; ethanol; greenhouse gas; land use change; maize; article; cropland; environmental management; greenhouse gas; land use; priority journal; recycling; United States; Carbon Dioxide; Crops, Agricultural; Ecosystem; Energy-Generating Resources; Environment; Ethanol; Greenhouse Effect; Time Factors; Trees; United States; Zea mays; Panicum virgatum; Zea mays
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245407
作者单位	Woodrow Wilson School, Princeton University, Princeton, NJ 08544, United States; German Marshall Fund of the United States, Washington, DC 20009, United States; Georgetown Environmental Law and Policy Institute, Washington, DC 20001, United States; Agricultural Conservation Economics, Laurel, MD 20723, United States; Woods Hole Research Center, Falmouth, MA 02540-1644, United States; Center for Agricultural and Rural Development, Iowa State University, Ames, IA 50011, United States
推荐引用方式 GB/T 7714	Searchinger T.,Heimlich R.,Houghton R.A.,et al. Use of U.S. croplands for biofuels increases greenhouse gases through emissions from land-use change[J],2008,319(5867).
APA	Searchinger T..,Heimlich R..,Houghton R.A..,Dong F..,Elobeid A..,...&Yu T.-H..(2008).Use of U.S. croplands for biofuels increases greenhouse gases through emissions from land-use change.Science,319(5867).
MLA	Searchinger T.,et al."Use of U.S. croplands for biofuels increases greenhouse gases through emissions from land-use change".Science 319.5867(2008).