Clean Air – Page 3 – Environmental and Energy Law Program

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Podcast: Unpacking EPA’s Decision to Rescind the Endangerment Finding

Jody Freeman on the history of the Endangerment Finding, EPA’s rescission, and what could happen if it reaches the Supreme Court.

March 2, 2026

Legal Analysis

Eliminating the Foundation: Vulnerabilities in and Implications of EPA’s Endangerment Finding Rescission

Analysis breaking down EPA’s arguments in the final rule and what it could mean for regulating GHG emissions in the future.

March 2, 2026

Legal Analysis

Climate Brief: The Legal Reasoning Behind the Endangerment Rescission

How the Trump Administration justified eliminating the bedrock finding for federal greenhouse-gas regulation, and what comes next.

February 17, 2026

Regulatory Tracker

Once In Always In Guidance for Major Sources under the Clean Air Act

Congress repealed the 2024 rule using the Congressional Review Act and EPA reinstated the 2020 rule, which allows a major source to reclassify as an area source if the source reduces HAP emissions.

February 11, 2026

Legal Analysis

The Congressional Review Act in 2025: Expanding Use and Emerging Questions

After decades of limited use, Congress used the Congressional Review Act 22 times in 2025, testing the boundaries of congressional power, agency rulemaking, and the courts’ role in reviewing CRA actions.

February 5, 2026

Regulatory Tracker

Power Plant Startup, Shutdown, and Malfunction Rule

In early January 2025, the Biden EPA withdrew its direct final rule and indicated it would release a subsequent rule addressing the 13 states that failed to submit state implementation plan revisions.

January 2, 2026

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The Endangerment Finding and the DOE Climate Science Report

Video: Jody Freeman and other Harvard faculty experts discuss what’s at stake for current and future climate regulation.

October 8, 2025

Regulatory Tracker

Municipal Solid Waste Landfill Air Pollution Emission Standards for Methane and Other Pollutants

MSW landfills are currently subject to EPA’s 2016 New Source Performance Standards and Environmental Guidelines. In Sept. 2025, EPA proposed to delay the GHG reporting rules until 2034.

September 16, 2025

CleanLaw Podcast

CleanLaw — What Science and the Law Say About EPA’s Authority to Regulate GHGs

Jody Freeman, Richard Lazarus, and Stanford’s Solomon Hsiang discuss EPA’s proposal to eliminate greenhouse gas regulations and the flawed science the proposal relies on.

August 18, 2025