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GTAP Resource #3432

"Effects of US Maize Ethanol on Global Land Use and Greenhouse Gas Emissions: Estimating Market-mediated Responses"
by Hertel, Thomas, Alla Golub, Andrew Jones, Michael O’Hare, Richard Plevin and Daniel M. Kammen


Abstract
Releases of greenhouse gases (GHG) from indirect land-use change triggered by crop-based biofuels have taken center stage in the debate over the role of biofuels in climate policy and energy security. This article analyzes these releases for maize ethanol produced in the United States. Factoring market-mediated responses and by-product use into our analysis reduces cropland conversion by 72% from the land used for the ethanol feedstock. Consequently, the associated GHG release estimated in our framework is 800 grams of carbon dioxide per megajoule (MJ); 27 grams per MJ per year, over 30 years of ethanol production, or roughly a quarter of the only other published estimate of releases attributable to changes in indirect land use. Nonetheless, 800 grams are enough to cancel out the benefits that corn ethanol has on global warming, thereby limiting its potential contribution in the context of California’s Low Carbon Fuel Standard.


Resource Details (Export Citation) GTAP Keywords
Category: GTAP Application
Status: Published
By/In: BioScience 60: 223–231
Date: 2010
Version:
Created: Walmsley, T. (8/27/2010)
Updated: Batta, G. (1/17/2013)
Visits: 2,017
- Bioenergy


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Public Access
  File format GTAP Resource 3432  (4.2 MB)   Replicated: 0 time(s)


Restricted Access
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Special Instructions
SCBioApp is the Short course application used in the 2010 short course.


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