How might U.S. national security be threatened by mega-droughts, coastal flooding, killer hurricanes, food scarcity and the other ecological calamities scientists widely predict will occur if global warming continues apace?
No one knows, but Sens. Chuck Hagel, R-Neb., and Dick Durbin, D-Ill., think it's time to find out. Two weeks ago, the bipartisan duo introduced a bill that would require federal intelligence agencies to collaborate on a National Intelligence Estimate to evaluate the security challenges presented by climate change.
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