The role that the proposed Keystone XL tar sands pipeline plays in enabling tar sands expansion continues to be central in answering whether the project fails the president's climate test.
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While TransCanada has asked for a rubber stamp process than only evaluates a minor route change in Nebraska, concerned Americans and the environment community have made their expectations of the environmental review process clear.
What does that mean for tar sands pipelines like Keystone XL and Northern Gateway?
President Obama's decisions on Keystone XL and standards for greenhouse gas emissions from power plants will shape this legacy.
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