Reuters: Environmental groups on Monday asked the Obama administration to extend the approval process of the Keystone XL pipeline, using last month's spill of heavy Canadian crude oil in Arkansas as their latest reason to delay the project.
The Obama administration is deciding whether to approve the Canada-to-Nebraska leg of TransCanada Corp's proposed pipeline, which would link Canada's oil sands, the world's third richest crude oil deposit, to refineries in Texas.
The State Department, which issued...