President-elect Obama wants to work toward reducing greenhouse-gas emissions by 80 percent by 2050, but a new study from a D.C. research group says even that rate won't be enough to avoid potentially catastrophic disruptions to the world's climate. The Worldwatch Institute, which sounds a little like a group with an underground lair in a James Bond film, released its 2009 State of the World report this week, claiming the world will have to reach near-zero emissions by mid-century if it wants to avoid the worst consequences of a changing climate. As you might guess from the title "State of …
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