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Obama Set for Retry of Smog Rule Businesses Say May Be Costliest

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The Obama administration is poised to propose safety standards for smog, setting out pollution policies that will have wide-ranging implications for auto fuels, coal plants and childhood asthma for decades to come.

The U.S. Environmental Protection Agency is due to offer its proposal for nationwide ozone levels as early as today, and industry and health lobbyists in touch with administration officials predict it will follow the lead of its science advisers and propose a range of tighter standards.