A leading conservation group is accusing polluter nations of censoring a forthcoming United Nations report on global warming. The World Wildlife Fund says vital facts have been deleted from the U.N. Intergovernmental Panel on Climate Change’s study set for release on Saturday. The deletions are said to include warnings of more destructive hurricanes, the warming of the Pacific Ocean and the loss of glaciers in the European Alps. The report will predict that a third of the world’s species face extinction if greenhouse gas emissions continue apace.