What is the Willow project in Alaska? Controversial oil drilling plan explained

The Biden administration is approving a major oil project on Alaska's petroleum-rich North Slope that supporters say represents an economic lifeline for Indigenous communities in the region but environmentalists say is counter to President Joe Biden's climate goals.

The announcement comes a day after the administration, in a big conservation move, said it would bar or limit drilling in some other areas of Alaska and the Arctic Ocean.

The decision on ConocoPhillips Alaska's Willow project, in a federal oil reserve roughly the size of Indiana, was revealed Monday.