By MEREDITH MACKENZIE
WASHINGTON, Feb. 23 (UPI) -- The secret to making ethanol production viable is invisible. Microorganisms such as yeasts and bacteria are being perfected as a way to ferment cellulosic material, like corn stalks or sawdust, into transportation-grade ethanol. The future, say scientists, is already here.
"There are no technical barriers to making ethanol from woody material today," said Lonnie Ingram, a microbiologist and professor at the University of Florida.