Power Sector – Page 2 – Environmental and Energy Law Program

Legal Analysis

EPA’s Final Rule Rescinding 2024 MATS Rule and Reinstating 2012 Standards

The legal foundations, regulatory history, and contested cost-benefit rationale behind EPA’s repeal of the 2024 MATS rule.

March 18, 2026

Regulatory Tracker

Implementation of 2015 Ozone National Ambient Air Quality Standards (NAAQS)

Under the Trump executive order Regulatory Freeze Pending Review, the Biden administration’s final rule setting deadlines for states to submit SIPs for nonattainment areas did not go into effect. On June 3, 2025, EPA announced its plans to reconsider the rule.

March 9, 2026

Legal Analysis

Recent History of US Methane Regulation

An analysis of the three core elements of U.S. methane policy and a look at the role of states.

January 23, 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

Legal Analysis

EPA Proposes to End Greenhouse Gas Reporting

A summary of EPA’s proposal to eliminate the Greenhouse Gas Reporting Program and a look at the potential impacts to federal, state, and industry efforts.

September 30, 2025

Post

Harvard Climate Blog: Clean Air Rules Save Lives, and are Required by Law

What are the legal risks and health consequences of the Trump administration’s proposals to eliminate two clean air regulations for power plants? A lawyer and doctor explain.

July 23, 2025

Legal Analysis

EPA Proposes to Eliminate Power Sector Greenhouse Gas Emissions Regulations

We look at the inconsistent arguments within the proposal and discuss the potential legal risks if EPA were to finalize a rule consistent with the proposal.

June 23, 2025

Legal Analysis

Trump Administration’s Proposed Repeal of the 2024 Updates to the Mercury and Air Toxics Standards (MATS)

Analysis of the proposed repeal, including impacts to public health, use of continuous monitoring systems, the mercury emission standard, and more.

June 20, 2025

Explainer

Litigation Pursuant to Executive Order 14260

Tracking lawsuits pursuant to the executive order, Protecting American Energy From State Overreach.

May 28, 2025