As the White House moves ever so slowly toward a decision on the Keystone XL pipeline, some environmental groups used Monday — Earth Day — to remind the president that approval of the massive project would carry real consequences. “You’ll see … the biggest spread of peaceful civil disobedience in modern American history,” said Becky Bond, political director of the liberal activist group Credo. The organization has been among the loudest opponents of the proposed pipeline, which would carry oil sands from Alberta, Canada, south through the U.S. heartland to refineries on the Gulf Coast. Credo helped organize a San...