“The vast volumes of carbon in the tar sands ensure that they will play an important role in whether or not climate change gets out of hand; understanding the role this largescale new pipeline will play in that process is clearly crucial,” states the letter from scientists including Ken Caldeira of the Carnegie Institution, James Hansen of NASA and Columbia University, Penn State University's Michael Mann and others.
But a State Department environmental review prepared for an earlier TransCanada application, which the White House rejected early this year, said the project is not likely to affect the amount of oil produced from Alberta’s oil sands projects.
An Obama campaign representative said last week that the administration would likely make a decision on the current pipeline application in the first quarter of 2013.
GOP White House hopeful Mitt Romney has pledged to approve Keystone on “Day One” if elected.
The whole letter from the scientists is here.