President Barack Obama banned new offshore oil and gas drilling in more than 100 million acres of the U.S. Arctic and undersea canyons in the Atlantic Ocean, a move certain to provoke a fight with the Republican-led Congress and his successor in the White House. In an announcement coordinated between two of the world’s biggest oil producers, Canadian Prime Minister Justin Trudeau also committed to freeze new offshore leasing in his nation’s Arctic waters and review the matter every five years.