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The greenhouse gas emissions “trigger” provides new clarity for how FERC processes and regulates gas projects, said Sarah Ladin, an attorney at the Institute for Policy Integrity at the New York University School of Law. She noted that FERC has been completing supplemental environmental impact statements for some gas projects over the last year, despite having already issued environmental assessments for the same proposals. “We won’t have to see the delays we saw, where there’s an EA first and [then] a supplemental EIS,” Ladin said.

Louisiana's recent win in litigation that barred President Joe Biden's administration from using a contested calculation for determining the "social cost of carbon" could upend federal oil and gas lease sales planned in the coming months. Interior officials are "sort of in a 'damned if we do, damned if we don't' scenario," New York-based think tank Institute for Policy Integrity senior attorney Max Sarinsky said. This injunction "prohibits them from using the best available metric to assess climate impacts of their lease sales. If they do not include that assessment, that of itself could be problematic."

The U.S. Department of Justice declined to say whether it will appeal Judge Cain's order to the Fifth Circuit, but even if the case ultimately ends in the social cost of carbon and other metrics being struck down, that doesn't mean the end of the Biden administration's forward motion on climate change-related regulations, said Max Sarinsky, a senior attorney at the Institute for Policy Integrity at NYU School of Law. To begin with, only the current social cost of greenhouse gas metrics are at issue in the litigation, Sarinsky said. "This doesn't prohibit agencies from using any evaluations of the social cost of greenhouse gases — it only prohibits them from using the Interagency Working Group's evaluations and some of the Interagency Working Group's methodologies," he said.

The Biden administration is preparing strict new limits on pollution from buses, delivery vans, tractor-trailers and other heavy trucks, the first time tailpipe standards have been tightened for the biggest polluters on the road since 2001. “This is a historic role that California has played since 1970, a role that was interrupted only during the Trump administration,” said Richard Revesz, a professor of environmental law at New York University. “This is a hugely important policy but it’s also a return to the traditional way of understanding the relationship between the federal government and California with regards to vehicle pollution. It’s a moment of return to normalcy.”

One year after launching a reevaluation of its pipeline approval process, the Federal Energy Regulatory Commission (FERC) could be ready to adopt critical reforms. The result could be a more sustainable, reliable U.S. energy system.

“I think the decision will get very, very close scrutiny on appeal,” argues Max Sarinsky, a senior attorney at the Institute for Policy Integrity (IPI) at New York University School of Law. “This decision suffers from obvious constitutional deficiencies.”

"This injunction is extraordinarily broad," Max Sarinsky, an attorney at the Institute for Policy Integrity at NYU Law School, told Axios. "I think it will receive very, very close scrutiny on appeal."

In lease sales in Wyoming and Utah, BLM applied the social cost of greenhouse gases while proposing to move ahead with substantial new oil and gas leasing. “I don't see how there's any injury from that,” said Max Sarinsky, a senior attorney at the Institute for Public Integrity at New York University School of Law. “And it also undercuts [red-state challengers'] whole theory that these numbers in and of themselves will necessarily cause substantial harm.”

Not fully accounting for carbon damages would skew any cost-benefit analysis of a proposed rule in favor of industry, said Max Sarinsky, a Senior Attorney at the Institute for Policy Integrity. He added that the social cost of carbon had been “instrumental” in allowing agencies to accurately judge how their rules affect the climate.

USPS's final environmental impact statement [for its plans to acquire new vehicles] “has some disappointing omissions, though the Postal Service was right to use the [SCC] in the first place," said Andrew Stawasz, a Legal Fellow at the Institute for Policy Integrity.