| http://www.w3.org/ns/prov#value | - An online survey of the Herald Readers' Panel was conducted by the Nielsen Company between December 10 and December 17, as world leaders prepared to meet at the UN climate conference in Copenhagen.Thirty-eight per cent said global warming was a serious problem that needed action now, 13 per cent said it was the world's biggest challenge, and 2 per cent did not know.Nineteen per cent - including al
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