Study: Emissions alter Arctic climate
Human activity said to reverse cooling
Posted: September 5, 2009 at 4:07 a.m.
Human-generated greenhouse-gas emissions have helped reverse a 2,000-year trend of cooling in the Arctic, prompting higher average temperatures in the past decade that now rank warmer than at any time since 1 B.C., according to a new study published Thursday in the online version of the journal Science.
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Front Section, Pages 8 on 09/05/2009
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