Defending EPA’s Endangerment Finding and Vehicle Emissions Standards

The Environmental Protection Agency is required by law to protect us from air pollution that endangers public health and welfare — including greenhouse gases that are driving climate change. Earthjustice is holding EPA accountable to its mission by defending the Endangerment Finding and vehicle emissions standards.

Case Overview

In American Public Health Association v. EPA, Earthjustice represents 15 nonprofits and Alaskan tribes to defend the Endangerment Finding and vehicle emissions standards from the Trump administration’s attempts to repeal the rules. (Earthjustice clients filed challenges to EPA’s repeals in two filings, which are consolidated in the American Public Health docket.)

Earthjustice and partners also filed a petition for administrative reconsideration that highlights specific flaws in EPA’s repeal rule that were not available for public comment and requests that EPA reopen public comment to address them.

Earthjustice and our partners have a long history of defending these rules. In 2012, polluting industries tried to challenge EPA’s authority to reduce greenhouse gas emissions from vehicles and other sources in Coalition for Responsible Regulation v. EPA. Earthjustice, along with other environmental organizations and states, successfully intervened to defend the Endangerment Finding from industry’s attack.

Earthjustice and our partners will continue to defend the rule of law and demand that EPA focus on protecting our health and environment.

A black-and-white photo of a multi-lane freeway filled with cars.
In 2009, EPA determined that emissions of greenhouse gases from new motor vehicles contribute to pollution that causes climate change. (Steven Worster / CC BY-ND 2.0)

Case Updates

Trucks driving on Interstate 80.
April 16, 2026 Press Release

Health, Environmental Groups Ask EPA to Reconsider Flawed, Unlawful Decision to Repeal the Endangerment Finding

Petition identifies multiple, serious problems with new information and analysis in final rule

April 15, 2026 document

Petition for Reconsideration: Endangerment Finding

Nonprofits filed a petition for reconsideration on the faulty science EPA used to justify its repeal of the endangerment finding.

Cars and trucks move along the Cross Bronx Expressway, a notorious stretch of highway in New York City that is often choked with traffic and contributes to pollution and poor air quality on November 16, 2021 in New York City. (Spencer Platt / Getty Images)
April 8, 2026 Press Release

Environmental Groups Sue EPA For Illegal Repeal of Climate Protections

Environmental groups and Alaskan tribes challenge the Trump EPA’s unlawful repeal of the endangerment finding and elimination of vehicle emissions standards