FILE - In this Jan. 20, 2021, file photo, President Joe Biden reaches for a pen to sign his first executive order in the Oval Office of the White House in Washington. Biden arrived at the White House ready to wield his pen to dismantle Donald Trump’s legacy and begin pushing his own priorities.  (AP Photo/Evan Vucci, File)

In this Dec. 18, 2020 photo, pipes to be used for the Keystone XL pipeline are stored in a field near Dorchester, Neb. Experts say President Joe Biden's pledge to undo his predecessor's anti-regulatory policies on the environment won't be accomplished easily, despite a fast start. After taking office last week, Biden returned the U.S. to the Paris climate accords, revoked the Keystone oil pipeline’s federal permit and halted oil and gas leasing in the Arctic National Wildlife Refuge. (Chris Machian/Omaha World-Herald via AP)