"Between 2008 and 2011, American farmers converted 23 million acres of wetlands and grasslands – an area the size of Indiana – to crop production. EWG’s analysis estimates that this massive transformation in the way the land is being used has resulted in greenhouse gas emissions of between 85 million and 236 million metric tons a year more than previous years.
It turns out that corn ethanol has actually accelerated global warming more than gasoline. Recent research by the EPA has estimated that ethanol production increases greenhouse gas emissions by 33 percent, compared to gasoline."
http://www.ewg.org/agmag/2014/05/ethanol-s-broken-promise
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