Mar 05, 2012 08:00 AM
José Pedro Martins
Rio+20 will stoke the debate over biofuels
Global event will pit biofuels against food security.
The debate over the use of farmland for the production of biofuels, which affects food security worldwide, will resume with force during Rio+20, the United Nations Conference on Sustainable Development set to take place in Rio de Janeiro in early June 2012.
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