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11 things you thought were green -- but there's a catch

By: Bryan Nelson on March 10, 2010, 10:55 a.m.
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There are a number of legitimately green biofuel sources, but many biofuels are unsustainable. Aside from the food vs. fuel debate — over biofuels produced from crops such as corn or soybeans — some biofuel sources are also the cause of deforestation and water shortages. For example, palm oil production for fuel increases greenhouse gas emissions through deforestation around the globe, especially in southeast Asia. Just because it's not a fossil fuel doesn't mean it's inherently green.