By Emma Farge GENEVA (Reuters) - Human activity kept global temperatures close to a record high in 2011 despite the cooling influence of a powerful La Nina weather pattern, the World Meteorological Organization said on Friday. On average, global temperatures in 2011 were lower than the record level hit the previous year but were still 0.40 degrees Centigrade above the 1961-1990 average and the 11th highest on record, the report said. WMO Secretary-General Michel Jarraud warned that the consequences of global warming could be permanent
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