The Environmental Protection Agency (EPA) declared this Tuesday Climate Regulation Liberation Day and proposed repealing the 2009 “endangerment finding,” which gave the agency the legal basis to regulate greenhouse gas emissions under the Clean Air Act.
The finding, issued during the Obama administration following the Massachusetts v. EPA Supreme Court ruling, concluded that carbon dioxide and other greenhouse gases posed a threat to public health and welfare.
Critics of the finding argue that Congress never explicitly authorized the EPA to regulate CO2 and that the original ruling relied on selective science.
A new report from the Department of Energy, authored by independent scientists including former Obama official Steven Koonin, emphasizes that carbon dioxide lacks the direct health impacts typical of regulated pollutants like sulfur dioxide or ozone. It is odorless, non-toxic at ambient levels, and does not cause smog.
Scientific Uncertainty and Regulatory Limits
The EPA’s proposal reflects a shift toward “regulatory humility,” acknowledging ongoing uncertainties in climate science and reinforcing the idea that Congress — not agencies — should decide major policy questions. Supporters say the move will prevent federal overreach and restore legislative oversight.
Opponents, however, warn that repealing the endangerment finding could stall efforts to limit emissions from vehicles, power plants, and industrial sources.
Relevant: New Penn Framework Offers Blueprint For Smarter Carbon Management Policy
Legal challenges are expected. Some Democrats argue that language in the Inflation Reduction Act still allows EPA to treat greenhouse gases as pollutants, but experts note the law doesn’t expand the agency’s regulatory authority.
The proposal sets the stage for renewed legal and political battles over the federal government’s role in climate regulation — possibly leading to a Supreme Court review of the 2007 precedent that originally enabled greenhouse gas rules.
Read more: Over 100 Western Officials Demand End To 45Q Carbon Capture Credit
