Yale Environment 360: Thanks to the closing of a record number of coal-fired power plants, emissions from the U.S. power sector in 2015 are expected to fall 15 percent below 2005 levels, according to an analysis by Bloomberg New Energy Finance. The report said that seven percent of the U.S.s coal-fired power capacity will be shut down this year, and that on the basis of emissions per-unit-of-power-generated, 2015 will be the cleanest year in more than 60 years. The loss of coal-fired power is being made up by cleaner...