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People stand on the world's largest solar-powered boat in Cancun December 8, 2010. The Turanor Planet Solar arrived in Cancun on December 6 as part of its expedition around the globe and as climate talks are underway in the beach resort. The world's governments struggled on Wednesday to break a deadlock between rich and poor nations on steps to fight global warming and avert a new, damaging setback after they failed to agree a U.N. treaty last year in Copenhagen. REUTERS/Gerardo Garcia (MEXICO - Tags: POLITICS ENVIRONMENT IMAGES OF THE DAY ENERGY BUSINESS)
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