Associated Press: President Barack Obama said Tuesday that the proposed Keystone XL pipeline project from Canada to Texas should only be approved if it doesn't worsen carbon pollution.
The $7 billion pipeline has become a contentious issue, with Republicans touting the jobs it would create and demanding its approval and environmentalists urging the Obama administration to reject it, because it would carry carbon-intensive oil from Canadian tar sands to the Texas Gulf Coast.
"Allowing the Keystone pipeline to...