The Washington Post
by Brad Plumer
February 9, 2013

Remember cap-and-trade? Back in 2010, Democrats in Congress had a proposal to set a nationwide limit on U.S. greenhouse-gas emissions and let businesses trade pollution permits. But the climate bill died, and cap-and-trade mostly vanished from discussion.

Except in the Northeast. For the past decade, ten states stretching from Maine to Maryland have been experimenting with their own modest cap on carbon pollution from electric power plants. And, this week, the Regional Greenhouse Gas Initiative (RGGI) announced that it would continue to cut emissions by tightening the cap between now and 2020.

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http://www.washingtonpost.com/blogs/wonk...-is-it-working/