http://news.bbc.co.uk/1/hi/world/americas/7065061.stm

A United Nations expert has condemned the growing use of crops to produce biofuels as a replacement for petrol as a crime against humanity.
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It was, he said, a crime against humanity to divert arable land to the production of crops which are then burned for fuel.
He called for a five-year ban on the practice.
Within that time, according to Mr Ziegler, technological advances would enable the use of agricultural waste, such as corn cobs and banana leaves, rather than crops themselves to produce fuel.