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September 21, 2012 - From the health costs of air pollution, to the expense of preparing first responders for dealing with disasters, fracking for natural gas comes at a heavy price to local communities.

September 19, 2012 - In a speech to wealthy donors, Republican presidential candidate Mitt Romney said 47 percent of Americans "pay no income tax," are "dependent upon government," and "will vote for the president no matter what." A look at the numbers behind those claims.

September 18, 2012 - A Virginia circuit court judge rules that the school does not have to turn over former professor Michael Mann's e-mails to the American Tradition Institute, a fossil-fuel-funded think tank that works to discredit climate scientists. The case is now expected to move on to the state Supreme Court.

September 18, 2012 - Conservative donor Art Pope has given millions to North Carolina's public universities, often to have his offers rejected over political controversies. Now he has a seat at the table in deciding the UNC system's future.

September 17, 2012 - Chicago Mayor Rahm Emanuel and his administration's school leaders have come perilously close to sounding like one of those Mississippi legislators back in 1985 who dealt with a statewide teachers' strike by giving them a pay raise -- but at the cost of a provision that prevented them from ever striking again.

September 14, 2012 - Since Hurricane Isaac, oily tar has washed ashore along the beaches and bayous of the Gulf -- some of it linked to BP's Deepwater Horizon disaster, which locals report is having a lasting impact on their treasured fishing grounds.

September 14, 2012 - The U.S. solar market is growing by leaps and bounds, thanks in part to policies pursued by the Obama administration. But fossil fuel interests are spending heavily in this election to ensure it's a one-term administration.