Arctic global warming may be irreversible

Scientists, noting sea ice in the Arctic has failed to form for the second consecutive winter, fear global warming may be irreversible in polar areas.

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<p><a href="http://www.physorg.com/news11743.html">Arctic global warming may be irreversible</a></p> <p>Scientists, noting sea ice in the Arctic has failed to form for the second consecutive winter, fear global warming may be irreversible in polar areas. </p>