What's going on here? Tree huggers and their mortal enemies in the oil business are suddenly working together. Both the Sierra Club and the American Petroleum Institute oppose an effort by corn growers and distillers to change clean-air standards to allow greater use of grain alcohol as a motor fuel. Environmental groups believe increased use of alcohol in fuel will boost emissions of volatile organic compounds, which contribute to smog. And oil companies, which have invested heavily in reformulated gasolines to meet clean-air requirements, don't want to lose business to gasohol.

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