“I think it’s clear that the Keystone pipeline has no impact on GHG emissions,” Girling said yesterday in an interview at the New York headquarters of Bloomberg News. “What we’re really talking about is Canadian oil versus Venezuelan oil and what is the net difference between the two, and it’s zero.”
The carbon-dioxide emissions tied to the pipeline would have “an unmeasurable impact on climate,” according to TransCanada’s letter. "
For the full article Google- TransCanada Rebuffs EPA’s Call for Keystone Clean Energy
I gather from the article the final decision on the Keystone XL will be made at the end of this year or early next year.