Associated Press: U.S. President Barack Obama said the State Department should not approve the Keystone XL pipeline unless it is sure the project will not increase greenhouse gas emissions.
Obama made the announcement Tuesday in a speech on his climate change plan at Georgetown University.
"Allowing the Keystone pipeline to be built requires a finding that doing so would be in our nation's interest," Obama said. "And our national interest will be served only if this project does not significantly exacerbate...