WAY BEYOND ETHANOL: A look at the future of biofuels. “The key to the next generation of biofuels isn’t growing in a field; it’s mutating in a lab. By swapping natural genes in yeast and bacteria for synthetic ones, scientists have tricked the microbes into producing hydrocarbons—creating, in essence, billions of tiny refineries to turn simple sugars into environmentally friendly diesel, gasoline, jet fuel and biocrude.” Bring it on.