Although ethanol is one of the earliest biotechnologies, it wasn’t until the energy crisis of the 1970s that ethanol was widely used as an additive to gasoline. Back then, concerns about the price of fuel and the impact of leaded gas on the environment led to a search for less expensive and more environmentally friendly alternatives. Ethanol seemed to fit both criteria. Today, approximately 90% of the gasoline sold in the United States contains ethanol—and this ethanol is largely produced from corn. Corn is used …
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