FILE - In this April 3, 2018 file photo Environmental Protection Agency Administrator Scott Pruitt speaks at a news conference at the Environmental Protection Agency in Washington. Pruitt indicated this week he may target a longstanding federal waiver that allows California to set its own, tougher tailpipe emission standards, an exception that's allowed the state to prod the rest of nation to do more against air pollution and climate change for a half-century. (AP Photo/Andrew Harnik,File)
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