| http://www.w3.org/ns/prov#value | - http://news.bbc.co.uk/2/hi/science/nature/3333493.stm The global warming debate has until now focused almost entirely on carbon dioxide and other greenhouse gas emissions, but scientists at the University of California ??? Irvine, suggest that a lesser-known problem ??? dirty snow ??? could explain the Arctic warming attributed to greenhouse gases???.The effect is more conspicuous in Arctic areas,
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