We had some really great threads last year, with the following four nominated for the Thread of the Year award in this January's Environment Site Awards ceremony.
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"Natural climate forces can not be underestimated, but no climate model produced can show the speed of the melting in the Arctic that has occurred without adding human contributed emissions." A Physicist from the U.S Army. http://www.theage.com.au/frontpage/2.../frontpage.pdf