NEW YORK (CNNMoney.com) -- Ethanol made from corn may be the sexy starlet of the nation's alternative energy policy but its cellulosic cousin is the young ingenue about to take center stage.

In Congress, where the 2007 energy bill is sparking heated debate over cutting tax breaks for oil companies and other provisions, legislative priorities actually call for a more ambitious program to develop ethanol from other sources over the next 15 years than from corn. Corn supplies could never keep up with American's insatiable thirst for gasoline, so other plant materials will be needed to fill the void.

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