World's mayors gather for climate-change summit in New York City Gone are the days when mayors chomped cigars and handed out keys to the city. Today's civic leaders face a somewhat more monumental task: saving the planet. This week, mayors from more than 30 of the world's biggest cities -- from Bangkok to Berlin, Sydney to Shanghai -- are in New York City to compare notes on fighting climate change. The C40 Large Cities Climate Summit follows a smaller event held in London in 2005; this time it also includes business leaders. With renewable energy, mass transit, and carbon reduction …
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