VALENCIA, Spain, Nov 17 (Reuters) - Climate experts agreed a U.N. blueprint on Friday for fighting global warming that warns that governments will have to act within years to avert the worst impacts, an author said.

Bill Hare, a climate scientist who wrote part of the report, told Reuters that the meeting of the U.N. climate panel in Valencia ended with delegates standing and applauding the agreement on a final summary for policymakers.

(Editing by Andrew Roche)

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