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U.S. power sector carbon emissions reach lowest level since 1988

Carnegie Mellon University just published an updated look at carbon emissions trends and data for the U.S. power sector that includes fourth-quarter and full-year 2017 information.

Why it matters: It gauges progress in wringing heat-trapping gases from what was, until recently, the largest source of U.S. carbon dioxide emissions (but has now fallen behind transportation).