Assisted Colonization: Saving Species or Creating New Invasives?
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Many vulnerable species are facing reduced numbers because the adaptations that have served them for thousands of years make them unable to survive small changes in temperature or precipitation. When faced with climate change and other threats to their habitat, some species may not be able to relocate quickly enough to save them from extinction.
A new technique called assisted colonization may prove to be an innovative solution.
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On May 1, 2008, the 
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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