2015 on pace to be the hottest year ever
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The National Oceanic and Atmospheric Administration and NASA reported last month was the warmest June on record. Both are also showing that 2015 is well on its way to being the warmest year on record so far.
Richard Alley, a professor at Penn State University, joined MPR News' Kerri Miller to discuss the implications of the two record-breaking years of warmth.
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