The countdown has begun on Capitol Hill to dig out from under the Obama administration’s environmental regulations, now that President Trump, who has vowed to repeal a number of regulations in his first 100 days, has moved into the Oval Office.

The Republican-controlled Congress needs to move quickly to head off two regulations that the GOP leadership has targeted for repeal: a rule imposing big restrictions on coal mining and another for regulating oil drillers’ methane emissions.