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The EPA logo on the door of its headquarters. Photo: Justin Sullivan/Getty Images

The Environmental Protection Agency has committed to rewriting a regulation banning certain uses of heat-trapping chemicals, a low-profile but nonetheless significant climate policy issued by then-President Barack Obama.

Driving the news: In a document signed late Friday by EPA Administrator Scott Pruitt, the agency laid out compliance guidelines for affected industries, chiefly heating and cooling companies, in the wake of a court ruling last year rejecting the Obama-era rule. EPA also committed to rewriting the rule, the first official comment from the agency on the issue, according to experts following the issue.

The back story: This Obama-era rule was meant to be the regulatory foundation for how the last administration would implement a new amendment to the Montreal Protocol, a global environmental treaty originally agreed to more than 30 years ago to protect the Earth’s ozone layer.

The amendment, approved by all world leaders in October 2016, phases down refrigerants used in air conditioners that contain powerful greenhouse gases called hydrofluorocarbons, or HFCs.

What’s next: For the Montreal Protocol amendment to legally take effect, the Senate must vote and approve it. The State Department has official jurisdiction over that, and a request for comment wasn’t immediately returned, though a career official expressed support for it late last year.

A senior EPA official said the agency is supporting the process, but if Congress doesn’t approve it, EPA views the amendment “as a backdoor attempt to turn the Montreal Protocol into a climate treaty.”

Bottom line: Trump is more likely to keep this policy more than any others issued by Obama, largely because the industries affected support the policy. The heating and cooling industry backs it because they've invested millions in new refrigerants to replace the existing ones.

Go deeper

Updated 2 hours ago - Politics & Policy

In photos: The Biden and Harris inauguration

President Biden and first lady Jill Biden watch a fireworks show on the National Mall from the Truman Balcony at the White House on Wednesday night. Photo: Chip Somodevilla/Getty Images

President Biden signed his first executive orders into law from the Oval Office on Wednesday evening after walking in a brief inaugural parade to the White House with First Lady Jill Biden and members of their family. He was inaugurated with Vice President Kamala Harris at the U.S. Capitol on Wednesday morning.

Why it matters: Many of Biden's day one actions immediately reverse key Trump administration policies, including rejoining the Paris Agreement and the World Health Organization, launching a racial equity initiative and reversing the Muslim travel ban.

Republicans pledge to set aside differences and work with Biden

President Biden speaks to Sen. Mitch McConnell after being sworn in at the West Front of the U.S. Capitol on Wednesday. Photo: Erin Schaff-Pool/Getty Images

Several Republicans praised President Biden's calls for unity during his inaugural address on Wednesday and pledged to work together for the benefit of the American people.

Why it matters: The Democrats only have a slim majority in the Senate and Biden will likely need to work with the GOP to pass his legislative agenda.

The Biden protection plan

Joe Biden announces his first run for the presidency in June 1987. Photo: Howard L. Sachs/CNP/Getty Images

The Joe Biden who became the 46th president on Wednesday isn't the same blabbermouth who failed in 1988 and 2008.

Why it matters: Biden now heeds guidance about staying on task with speeches and no longer worries a gaffe or two will cost him an election. His staff also limits the places where he speaks freely and off the cuff. This Biden protective bubble will only tighten in the months ahead, aides tell Axios.