Speaking before an enthusiastic crowd at a sold-out DAR Constitution Hall in Washington, D.C., former Vice President Al Gore issued a challenge to "repower America." Gore's challenge is undoubtedly ambitious: he wants the entire U.S. electricity sector to shift to zero-carbon sources like wind, solar, and geothermal in the next 10 years.
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The impacts of climate change are already being felt, especially in the most fragile and marginal ecosystems around the world. In particular, coral reefs, which are extremely sensitive to changes in the temperature and acidity of the water in which they form, are being destabilized by a changing ocean environment. Several scientific studies have demonstrated that many of the world's coral reefs are precariously close to total failure. A new study, while confirming this conclusion, does offer some hope.
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