Hope for climate treaty

(New York Times): Until recently, the idea that the world’s most powerful nations might come together to tackle global warming seemed an environmentalist’s pipe dream. The Kyoto Protocol, signed in 1997, was widely viewed as badly flawed. Many countries that signed the accord lagged far behind their targets in curbing carbon dioxide emissions. The United States refused even to ratify it. And the treaty gave a pass to major emitters in the developing world like China and India. But within weeks of taking office, President Obama has radically shifted the global equation, placing the United States at the forefront of the international climate effort and raising hopes that an effective international accord might be possible.

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