Excerpt:

The Clean Power Plan has never gone into effect because two dozen states, including Georgia, sued to block it.

Still, many coal-fired power plants have closed anyway, because natural gas is cheaper than coal.

“Market forces, particularly with gas prices being so low, have created a great deal of momentum in the right direction,” said Marilyn Brown, a professor at Georgia Tech's School of Public Policy. “But those are all really short-term advances. The question is, what are we going to be able to do to meet the longer-term goals? There's so much uncertainty.”  

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