On February 12, 2026, EPA Administrator Lee Zeldin announced what his agency called the "single largest deregulatory action in US history." The 2009 Endangerment Finding, the legal bedrock under the Clean Air Act that allowed the federal government to regulate greenhouse gases at all, was gone. Vehicle standards, power plant rules, methane guidelines: all of it lost its legal foundation in a single action. Zeldin called it a $1.3 trillion win for the American economy.
His own agency's analysis says otherwise.
EPA's internal cost-benefit work, scrutinized in an April 21 analysis, shows the repeal produces $180 billion in net costs once you run the actual numbers. The agency projects $87 billion per year in climate damages that prior standards were preventing. By 2055, the total damage figure clears $2 trillion. EPA's response to these numbers was not to dispute them. It was to stop monetizing them entirely, citing methodological uncertainty as cover for simply not doing the math.
When You Remove the Sensor, the Problem Doesn't Disappear
I spend a lot of time thinking about how engineers handle failure. When a rocket anomaly happens, the first instinct is never to remove the telemetry. You want more data, not less. What EPA did here is the engineering equivalent of pulling the temperature sensors off a rocket engine because the readings were inconvenient. The combustion doesn't care. It keeps happening.
Greenhouse gas emissions from vehicles, power plants, and methane sources will increase. That is not a projection from an advocacy group. It follows directly from removing the standards those sources were built around. Model year 2012 and later vehicles were designed against rules that no longer exist. Power plant operators who spent a decade building compliance infrastructure now face 2-plus years of legal limbo while courts sort out whether the repeal survives judicial review under the "rational connection" standard. Tyler Fry, a construction attorney at the Pacific Legal Foundation who supports the repeal, put it plainly in April: "EPA has removed the legal foundation upon which more than a decade of federal climate regulation was built." He meant that as a victory. It is also a description of the problem.
The fair point for the other side: federal climate regulation had real compliance costs, and some of those costs landed hardest on industries and workers with thin margins. That tension is real. But the answer to expensive regulation is better-designed regulation, not deleting the sensor array and declaring the system healthy.
The Patchwork Problem Is Already Starting
States are not waiting. California, Oregon, and others are accelerating their own GHG frameworks, which means manufacturers now face a compliance patchwork instead of a single federal standard. That is more expensive for industry, not less. The 13 state financial officers who submitted comments supporting the repeal in September 2025 wanted regulatory relief. What they are likely to get is a fragmented compliance environment and a wave of climate tort litigation that the 2011 Supreme Court decision in American Electric Power v. Connecticut had largely suppressed.
Courts will scrutinize this. The "rational connection" standard requires EPA to show a logical link between its action and the evidence. Ignoring $1.5 trillion in societal costs while claiming $1.3 trillion in savings is not a rational connection. It is a spreadsheet with half the columns deleted.
Congress wrote the Clean Air Act to require EPA to act when pollutants endanger public health. The science on greenhouse gases has not changed since 2009. The only thing that changed on February 12 was who controls the delete key.
