http://www.freep.com/story/news/local/michigan/2016/08/25/u-m-study-biofuels-worse-climate-change-than-gasoline/89265358/
https://drive.google.com/file/d/0B7ZwDXl-m2O9TFFiZXdRLUtsWlU/view
http://www.carsclimate.com/2015/08/bringing-biofuels-back-to-earth.html
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