In February 2025, the Trump administration revoked the 2009 endangerment finding, a cornerstone scientific determination by the EPA that greenhouse gases endanger public health and the environment. This finding, issued under the Clean Air Act, has been the legal basis for decades of federal climate and pollution regulations affecting vehicle emissions, power plant standards, and industrial air quality protections. The revocation was executed through agency directive by EPA leadership, stripping away the regulatory authority upon which federal climate action depends.

The direct impacts fall heavily on young Americans and frontline communities. Youth plaintiffs aged 18 to 20 argue the administration's rollback violates their constitutional rights to life and liberty by deliberately worsening atmospheric CO2 concentrations and toxic air pollution. Communities near coal plants, oil refineries, sterilization facilities, and industrial sites—already exposed to disproportionate pollution—face even fewer federal protections. Low-income and communities of color will experience accelerated climate impacts and increased respiratory disease, cancer risk, and developmental harm from unregulated toxic emissions.

This action represents the most sweeping climate deregulation yet in Trump's second term, escalating a pattern of systematic environmental rollbacks. It directly follows the EPA's rescission of 2024 ethylene oxide rules, the delay of forever chemicals drinking water protections, and the termination of EPA scientists and regulatory departments under EPA chief Lee Zeldin. By eliminating the endangerment finding itself rather than individual regulations, the administration removes the legal foundation for any future climate action and signals intent to prevent successor administrations from regulating greenhouse gases.

The case brought by eighteen youth plaintiffs is pending in federal court. These plaintiffs argue the endangerment finding revocation violates the Administrative Procedure Act—requiring reasoned decision-making and consideration of scientific evidence—and their constitutional rights under the Fifth Amendment. Courts have previously upheld the endangerment finding and rejected Trump-era challenges to climate regulations. Legal scholars anticipate immediate injunctive relief requests to prevent the endangerment finding's withdrawal pending litigation resolution.

Reversal would require either court intervention blocking the rescission or new EPA leadership reissuing the endangerment finding and restoring the regulatory authorities it supports, including vehicle emission standards, power plant rules, and industrial air quality protections. Congressional action could codify greenhouse gas regulation into statute, removing future presidents' ability to rescind the endangerment finding through executive action alone.