| http://www.w3.org/ns/prov#value | - Ten percent of U.S. gasoline demand was satisfied with corn ethanol, but ethanol and other fuels made from non-food sources have yet to hit the market.In many cases, renewables are not ready for primetime yet, says George Biltz, vice president for energy and climate change at Dow Chemical, which continues to work on a host of renewable technologies.Likewise, electric cars have not enjoyed the suc
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