Obama moves to tie Trump's hands on Arctic, Atlantic drilling
With Trump is bringing a strident pro-oil stance to the White House, the outgoing administration has launched a rearguard action.
President Barack Obama announced he was placing swaths of the Arctic and Atlantic "indefinitely off limits to future oil and gas leasing."
The protection covers an area of the Arctic roughly the size of Spain or Thailand and 31 sea canyons in the Atlantic.
A senior administration official said that there was a "strong legal basis" for the move, and suggested Trump could not revoke the decision without an act of Congress.
The move, based on a law from the 1950s, was taken in tandem with the Canadian government and introduces an additional headache should Trump try to row it back.
Obama said in a statement that the measures would "protect a sensitive and unique ecosystem."
He also warned that the risk of oil spills "are significant," and the ability "to clean up from a spill in the region's harsh conditions is limited."
The Hawaii-born president's second year in office was dominated by the catastrophic Deepwater Horizon oil spill, which poured millions of barrels of oil into the Gulf of Mexico.
The spill could not be stopped for 87 days, devastating wildlife and fishing-dependent communities in Louisiana, Mississippi, Florida, and Alabama.
The American Petroleum Institute, an industry lobby group, warned that Obama's decision "blocking offshore exploration would weaken our national security, destroy good-paying jobs, and could make energy less affordable for consumers."
Obama's eight years in office have resulted in a tidal wave of new environmental legislation, protecting marine ecosystems, curbing carbon emissions and boosting renewable energy.
Obama rushed through ratification of the Paris Climate Accord in record time to make sure that it could not be shelved by the incoming administration.
Many rules have been finalized, making them difficult to roll back. States like California have also introduced their own climate-friendly legislation.
But Obama's agenda is likely to come under sustained assault from the Trump administration.
The business tycoon-turned-commander-in-chief has named Exxon boss Rex Tillerson as his secretary of state and Scott Pruitt, a climate change denier, as head of the Environmental Protection Agency.