PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
Editorial use only.
EDITORIAL USE ONLY. Biofuel research. Researchers operating a system designed to convert barley grains (Hordeum vulgare, lower right) into the biofuel ethanol. The process typically involves using enzymes or microbes to drive fermentation of the plant material, producing ethanol as one of the products. Ethanol is used in motor vehicles as an alternative to fuel obtained from oil deposits. If obtained from renewable sources with minimal environmental impact, biofuels can cause less damage than oil products. Photographed in the USA.
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