April 11, 2011 8:44 PM

Ethanol producers look into the weeds for corn substitute

This country's battle to curb oil imports is being plotted in high-tech laboratories and elite universities hunting for breakthroughs in alternative fuels. The goal: Instead of using corn to make ethanol, see if it's feasible to use cellulosic fiber, particularly six-foot tall stalks of switchgrass.

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