Joe Biden could declare a climate emergency as soon as this week, according to The Washington Post, in a bid to implement elements of his environmental agenda as climate legislation has stalled in Congress.

Leading Biden administration officials are debating ways to advance the president’s agenda, and the president is prepared to announce a number of new initiatives to reduce greenhouse gas emissions, reported the Post, citing three people familiar with the matter. The internal discussions come after Democratic Sen. Joe Manchin of West Virginia told party leaders last week that he opposes the plans to advance this month’s significant economic package that includes billions of dollars toward slashing carbon emissions and promoting green energy.

White House Economic Adviser Jared Bernstein told reporters at a press briefing Monday that Biden would work “aggressively to attack climate change.”

“Realistically there is a lot he can do and there is a lot he will do,” Bernstein stated.

“Unilaterally declaring a climate emergency will not reduce emissions by one molecule,” American Exploration & Production Council CEO, Anne Bradbury said on Twitter Tuesday. “In fact, many of the policies that could follow from declaring a climate emergency would increase emissions while driving up costs for American families.”

Democratic lawmakers are also calling on Biden to use his powers to enact further climate policies amid failed legislative action and the Supreme Court’s recent decision to limit the regulatory abilities of the Environmental Protection Agency.