"China, the world's biggest carbon emitter, could nudge the United States into more action on climate change, rescuing the latest round of global talks and improving its international reputation."

President Obama is beating a retreat from some of his strong environmental promises as the campaign season begins.

Energy Secretary Chu faces a grilling on the Solyndra loan today from a hostile House committee.

"U.S. Energy Secretary Steven Chu has said it may take similar skills to navigate Washington politics as it does to make advances in physics research, a field in which he won a Nobel Prize in 1997.

A special joint investigation by National Public Radio, the Center for Public Integrity's iWatch News, the Investigative News Network, and others shows that hundreds of U.S. facilities have been violating their Clean Air Act permits for years without running into federal or state enforcement. In many cases, the pollution has made people sick, and sometimes local communities have taken up the job that federal and state agencies have failed at.

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"The U.S. Environmental Protection Agency and the U.S. Department of Transportation [Wednesday]formally unveiled their joint proposal to set stronger fuel economy and greenhouse gas emissions standards for model year 2017-2025 passenger cars and light trucks."