People walk past special halls set on the pitch of the National Stadium, the venue of the U.N. Climate Change Conference, in Warsaw, Poland, Sunday, Nov. 10, 2013. Climate envoys from rich countries, emerging economies and low-lying nations at risk of being swamped by rising seas will meet in Poland Monday for the next two weeks to lay the groundwork for a new global warming pact. (AP Photo/Alik Keplicz)
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