Michel Jarraud, Secretary-General of the World Meteorological Organization (WMO), speaks next to Intergovernmental Panel on Climate Change (IPCC) Chairman Rajendra Pachauri (R) as they present the ... more 
Michel Jarraud, Secretary-General of the World Meteorological Organization (WMO), speaks next to Intergovernmental Panel on Climate Change (IPCC) Chairman Rajendra Pachauri (R) as they present the U.N. IPCC Climate Report during a news conference in Stockholm, September 27, 2013. Leading climate scientists said on Friday they were more certain than ever before that mankind was the main culprit for global warming and warned the impact of greenhouse gas emissions would linger for centuries. REUTERS/Bertil Enevag Ericson/TT News Agency (SWEDEN - Tags: POLITICS ENVIRONMENT) ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. NO COMMERCIAL SALES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. SWEDEN OUT. NO COMMERCIAL OR EDITORIAL SALES IN SWEDEN less 
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Reuters | Photo By TT NEWS AGENCY / REUTERS
Fri, Sep 27, 2013 5:34 AM EDT