In late July, U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin announced at a trucking facility in Indiana that the Trump administration would be moving to rescind the “endangerment finding,” an agency declaration which provides the legal foundation for many major U.S. climate regulations.

Zeldin was joined at the press conference by U.S. Energy Secretary and former fracking executive Chris Wright, as well as Republican policymakers and representatives of auto groups including the American Trucking Associations (ATA).

This was just a small sampling of a powerful anti-climate coalition that for over a decade has attempted to overturn the endangerment finding, a 2009 scientific determination from the EPA that for the first time recognized carbon dioxide and five other greenhouse gases as  “pollutants” that are “harmful” and therefore must be regulated.

It’s a finding that helps provide the legal justification for EPA regulations on greenhouse gases from power plants, methane pollution from oil and gas operations, and limits on tailpipe emissions from cars and trucks. Now, the Trump administration will be seeking public comments and moving to officially repeal the finding by sometime next year.

DeSmog has been tracking and building databases on the anti-endangerment coalition for years. Below is our guide to the top fossil fuel groups, conservative policymakers, and climate deniers leading the effort to demolish the bedrock of American climate policy.

American Petroleum Institute

When the EPA first issued the endangerment finding in 2009, the American Petroleum Institute (API), the main lobby group for U.S. oil and gas producers, was immediately opposed. “[It] poses an endangerment to the American economy and to every American family,” the institute’s then-president Jack Gerard claimed.

API joined with other fossil fuel and industrial lobby organizations, including the National Association of Manufacturers, to wage an unsuccessful legal challenge against the finding. It recently applauded Zeldin’s announcement of rescinding endangerment and rolling back auto emissions regulations, arguing that the Trump administration is “protecting the freedom of all Americans to decide what they drive.”

U.S. Chamber of Commerce

Another early business opponent of the endangerment finding was the U.S. Chamber of Commerce, a lobby group representing millions of businesses whose membership has included oil and gas majors, fossil fuel utilities, and coal companies. Like API, it helped lead an unsuccessful legal action against the finding.

The Chamber of Commerce has a long record of climate obstruction, including being a member of an infamous climate denial organization known as the Global Climate Coalition. Yet its leadership is now trying to distance itself from Zeldin’s proposed repeal of endangerment, telling Reuters that, “While we did not call for this proposal, we are reviewing it and will consult with members so we can provide constructive feedback to the agency.”

Project 2025

The radical plan for dismantling the U.S. government published by the Heritage Foundation contains specific proposals for the EPA, calling for “a system, with an appropriate deadline, to update the 2009 endangerment finding.” One of the contributors to the EPA chapter is Aaron Szabo, now an assistant administrator at the agency.

Szabo was an advisor to a pro-Trump think tank known as the America First Policy Institute. He was also a former lobbyist “who pushed the interests of major polluters like members of the American Petroleum Institute,” according to Democratic Senator Sheldon Whitehouse, who spoke against Szabo at his EPA confirmation hearing.

One of Project 2025’s top architects, Russ Vought, now leads the White House Office of Management and Budget. He has also called for the repeal of the endangerment finding. “It’s long overdue to look at the impacts on our people of the underlying Obama endangerment finding,” he said in an EPA press release in March. 

Trump’s Climate Working Group

The EPA has justified its repeal of the endangerment finding — which states unequivocally that greenhouse gases are harmful to human health and the climate — by citing a recent Department of Energy report written by five prominent climate crisis deniers.

This so-called “Climate Working Group” includes Steve Koonin, John Christy, Ross McKitrick, Judith Curry, and Roy Spencer, all of whom have worked for years to publicly downplay the urgency of the climate crisis or deny that it exists. They argue in their report that carbon dioxide is good for humankind because it boosts “agricultural productivity,” an assessment that isn’t shared by actual climate scientists warning of dire threats to the global food supply from higher global temperatures.      

Heartland Institute

One of the longest-running U.S. climate denial groups, the Heartland Institute was a partner of Project 2025, and for years has advocated against the endangerment finding. It applauded Zeldin’s announcement, saying in a statement that “President Trump is doing the right thing for the economy, the environment, and the American people.”

The Heartland Institute has a major UK ally in Nigel Farage, head of the right-wing political party Reform UK, who last year helped launch a European branch of the denial group. At the Jordan Peterson conference known as the Alliance for Responsible Citizenship (ARC) earlier this year, Farage invoked a frequent climate denier talking point about endangerment, claiming that it’s “absolutely nuts” that carbon dioxide is considered a pollutant.

Koch Network

Climate denial groups that have received funding from foundations linked to the oil and gas billionaires Charles and David Koch are some of the most stalwart opponents of the EPA’s greenhouse gas finding. They include the CO2 Coalition, whose co-founder William Happer was on the National Security Council in Trump’s first administration, as well as the American Energy Alliance and the Competitive Enterprise Institute.

Koch-backed groups have achieved key U.S. Supreme Court victories that have paved way to undo the endangerment finding, including the case West Virginia vs. EPA, which weakened the agency’s ability to address climate change.

Zeldin cited that legal precedent explicitly in his announcement on Tuesday, saying, “would you want the administrator of the EPA to be ignoring the Supreme Court decisions in West Virginia vs. EPA?” He also cited the court’s rejection of the Chevron Deference — a long-standing doctrine giving federal agencies power to interpret the law where vague — which was the result of legal efforts backed in part by Charles Koch.

Critics argue this powerful anti-climate coalition ultimately serves the interest of companies profiting from polluting and warming our atmosphere. Senator Whitehouse said in a statement that “the Trump Administration’s repeal [of the endangerment finding] has the fossil fuel industry’s oily fingerprints all over it.” He added that “Trump chose his fossil fuel megadonors over the American people.”