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Ban Ki-moon

World leaders gather to try to save Earth from overheating

With dramatic vows to save future generations from an overheated planet, the largest gathering ever of world leaders began two weeks of talks Monday aimed at producing the most far-reaching pact yet to reduce greenhouse-gas emissions and avert environmental havoc.

"We should ask what will we say to our grandchildren if we fail," British Prime Minister David Cameron said as the U.N. climate summit opened under heavy security on the outskirts of Paris, two weeks after the extremist attacks that left 130 people dead. "Instead of making excuses tomorrow, let's take action today."

Even before the gathering, more than 180 countries pledged to cut or curb...