Clean Air – Page 5 – Environmental and Energy Law Program

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

Legal Analysis

Ethylene Oxide Emissions Standards for Commercial Sterilization Facilities

A summary of EPA’s EtO final rule for sterilization facilities and the significance of regulating EtO emissions for fenceline communities, plus a look at current litigation and the anticipated effort to roll it back.

May 28, 2025

Regulatory Tracker

Petroleum Refinery Sector Rule (NESHAPs / NSPS)

The Biden EPA amended the 2015 standards for refineries. On Mar. 12, the Trump administration slated these standards for rollback.

April 10, 2025

Legal Analysis

Clean Fuel Standard Directed Benefit Mechanisms to Promote Equity

New paper co-authored by Abby Husselbee looks at how CFS programs could be designed to direct public health, mobility, and economic benefits.

April 3, 2025

Regulatory Tracker

National Ambient Air Quality Standards (NAAQS) Review

EPA sets NAAQS for six common and harmful pollutants: carbon monoxide, lead, PM, ozone, nitrogen dioxide, and sulfur dioxide.

March 12, 2025

Legal Analysis

The President Targets EPA’s Authority to Address Climate Change — Will He Succeed?

Jody Freeman and Carrie Jenks on the future of the endangerment finding.

January 29, 2025

Legal Analysis

Final Rule Implementing the Waste Emissions Charge for Petroleum and Natural Gas Systems

Analysis of the changes EPA made in the final rule in response to public comments and reasoning for the changes.

December 2, 2024

Explainer

NAAQS Overview

The National Ambient Air Quality Standards program is the cornerstone of EPA’s work to protect public health and the environment.

August 29, 2024