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The biofuels industry is witnessing unprecedented growth in the United States, driving agricultural commodities prices to record levels and sparking a host of environmental and economic concerns. This expansion is far from imputable wholly to market forces; rather, federal, state and municipal jurisdictions have been instrumental in driving up both the production and consumption of biofuels through sizeable subsidies and other incentives. A new report by the Global Subsidies Initiative (GSI) and Earth Track, "Biofuels - At What Cost? Government Support for Ethanol and Biodiesel in the United States: 2007 Update", revises an earlier report issued October 2006 and details the extent of current government support to biofuels in the United States.