EcoWatch: Yesterday, 95 scientists and economists released a letter urging President Obama and Secretary Kerry to reject the Keystone XL tar sands pipeline, calling it a step in the wrong direction if the Obama administration is serious about addressing climate change. The letter draws upon comments President Obama made at Georgetown University in June 2013 when he stated, allowing the Keystone pipeline to be built requires a finding that doing so would be in our nations interest. And our national interest...