Biofuels might speed up global warming, says study
17 Feb 2009

The use of crop-based biofuels could speed up rather than slow down global warming by fueling the destruction of rainforests, scientists warn in a just-released report.
Once heralded as the answer to oil, biofuels have become increasingly controversial because of their impact on food prices and the amount of energy it takes to produce them, the report says.
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