| http://www.w3.org/ns/prov#value | - But for the first time the group asserted with near certainty ??? more than 90 percent confidence ??? that carbon dioxide and other heat-trapping greenhouse gases from human activities were the main drivers of warming since 1950.In its last report, in 2001, the panel, consisting of hundreds of scientists and reviewers, put the confidence level at between 66 and 90 percent.
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