Cases

Upholding EPA’s Global Warming Endangerment Finding

The Environmental Protection Agency has determined that human activities are driving climate change, which poses a major threat to our planet. This finding has been unsuccessfully challenged by the fossil fuel industry and its allies. Earthjustice helped defend the EPA’s finding to ensure that climate progress is not reversed.

Clients

Environmental Defense Fund

Regional Office / Program

Washington, D.C. Office

Case Overview

Earthjustice is co-counsel for Environmental Defense Fund, opposing industry lawsuits challenging the U.S. EPA’s scientific finding that global warming pollution endangers the public. In 2009, the EPA determined that emissions of greenhouse gases from new motor vehicles contribute to pollution that causes climate change, which in turn threatens human health and the environment.

In 2010, this finding led the EPA to issue the first-ever U.S. federal greenhouse gas emission standards for cars and trucks. These standards will prevent emissions of nearly one billion tons of carbon dioxide and other greenhouse gases.

Industry’s challenges to the endangerment finding and vehicle standards were rejected in 2012 by the U.S. Court of Appeals for the District of Columbia Circuit, and in 2013, the Supreme Court rejected industry’s effort to overturn that D.C. Circuit ruling.

In 2009, EPA determined that emissions of greenhouse gases from new motor vehicles contribute to pollution that causes climate change.
In 2009, EPA determined that emissions of greenhouse gases from new motor vehicles contribute to pollution that causes climate change. (Photo courtesy of Steven Worster.)

Case Updates

A flock of birds fly past a smokestack of a coal-fired power plant.
February 18, 2026 feature

Trump is Failing the Climate Test. Will You Pass Our Climate Quiz?

See how well you understand what the Trump administration is up to

A group photo of attendees and speakers at a press conference condemning the Trump Administration’s repeal of the Endangerment Finding is held outside the The Environmental Protection Agency Building in Washington D.C. Wednesday February 11, 2026.
February 18, 2026 Press Release

Earthjustice and Partners Sue EPA For Illegal Repeal of Climate Protections

Health, environmental groups challenge the Trump EPA’s harmful, unscientific, and illegal repeal of the endangerment finding and elimination of clean vehicle standards.

February 18, 2026 document

Endangerment Finding: Petition for Review

A broad coalition of health and environmental groups sued the Environmental Protection Agency for repealing the Endangerment Finding and vehicle emissions standards.

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Case page created on August 16, 2010.