New rules on corn ethanol may hurt environment

Reuters: U.S. corn growers expressed relief when the Obama administration unveiled new environmental rules that would boost use of corn-based biofuel, but green groups complained the guidelines may fill the air with nitrogen, a greenhouse gas viewed as more potent than carbon. The Environmental Protection Agency unveiled what amounted to a tweaking of the national renewable fuel standard in early February, and still found that ethanol made from corn is still cleaner than conventional gasoline, ......

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