A coalition of environmental groups challenged the U.S. federal permit for the Keystone XL oil pipeline in court on Thursday because they say additional environmental scrutiny is needed.
The Sierra Club, Natural Resources Defense Council and other groups say the initial environmental review completed in 2014 is inadequate and outdated, and that it underestimated how much the pipeline would encourage tar sands oil production in Canada.
The proposed pipeline that TransCanada wants to build would carry crude oil from Canada through Montana, South Dakota and Nebraska, where it would connect with an existing Keystone pipeline network that would take the oil to Texas Gulf Coast refineries.
CBC News – March 30, 2017.