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From Scientific American:
Have you heard enough already about global warming? It's so ... last year's news! Plenty of people are "doing something" about it. Becoming carbon-neutral has gone as mainstream as Girl Scout cookies; help is on the way. Can we move on, please?
Unfortunately not. For all the consciousness-raising value of grassroots initiatives, the world is still far from squarely facing up to the issues. Both Hillary Clinton and Barack Obama promise on their Web sites to reduce carbon emissions to just 20 percent of 1990 levels by 2050--a laudable goal. But because what matters is the load of greenhouse gases in the entire atmosphere, reaching those numbers would be hard, to say the least, for the U.S. to do alone.
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