In March, 25,000 science teachers received unsolicited materials from a libertarian think tank that cast doubt on the role humans play in climate change. Here's what happened next.
By Victoria Pasquantonio
In other news Wednesday, Vice President Joe Biden met with Palestinian leaders in the West Bank as the international community pressures Israel to stop expanding settlements in east Jerusalem. Also, there are reports that much of the U.N.'s food aid…
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