Biofuel
Bioengineers hope turning garbage into gas opens a green frontier in Iowa, Midwest
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The budding advanced biofuel industry stretches from Emmetsburg in the west to Marion in the east in Iowa, and also to several other parts of the country. Although business and political challenges remain, engineers have concocted an expensive cocktail of chemicals called enzymes that are too small to see with the naked eye, but can devour landfill trash and turn it into a new fuel that can run the family car.