While all eyes in America were turned to President Obama's looming decision on the Keystone XL pipeline, Canadian regulators on Thursday approved another pipeline that could play a role in bringing tar sands to America.
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A 2013 study found the rate of warming since 1900 is 50 times greater than the rate of cooling in the previous 5000 years, which threatens to destroy the stable climate that enabled civilization. A new study confirms again that recent warming has been unprecedented in speed, scale, and cause.