| Oil prices have dropped so low that the Keystone XL pipeline could play a bigger role in the development of Canada's oil sands and raise greenhouse gas emissions, Obama administration environmental regulators said.
The U.S. Environmental Protection Agency's comments in a letter to the State Department give weight to President Barack Obama's view that the controversial pipeline should not be approved if it significantly increases carbon pollution. The letter, sent on Monday, was released on Tuesday...............................................Full Article: Source
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