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Clean Air

EELP advises stakeholders on regulatory design questions to support the development and implementation of strong federal clean air rules.

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  • CleanLaw Podcast

CleanLaw — Bipartisan Reflections on EPA’s Past, Present, and Future (Part II)

Jody, Bill, and Christine discuss how bipartisan progress on environmental and public health issues was possible during their time at EPA, and the importance of scientific expertise.

July 31, 2025

CleanLaw — Bipartisan Reflections on EPA’s Past, Present, and Future (Part II)
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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

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

Corporate Average Fuel Economy Penalties

In July 2025, Congress eliminated the Corporate Average Fuel Economy civil penalties, resetting penalties to $0.00.

July 4, 2025

Corporate Average Fuel Economy Penalties
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Quick Take: Diamond Alternative Energy v. EPA

A look at the decision, how this case ended up in the Supreme Court, and how California’s vehicle standards work.

June 27, 2025

Quick Take: Diamond Alternative Energy v. EPA
  • 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

EPA Proposes to Eliminate Power Sector Greenhouse Gas Emissions Regulations
  • EELP News
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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

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

Air Transport Rules: Cross-State Air Pollution Rule/Good Neighbor Plan Rule

The Clean Air Act’s Good Neighbor provision requires upwind states to ensure that their instate sources do not contribute to downwind states’ attainment of the NAAQS. On Mar. 12, 2025, EPA announced its plan to roll back the Biden administration’s Good Neighbor Plan, which the Supreme Court stayed in June 2024.

June 18, 2025

Air Transport Rules: Cross-State Air Pollution Rule/Good Neighbor Plan Rule
  • 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

Ethylene Oxide Emissions Standards for Commercial Sterilization Facilities
  • Regulatory Tracker

National Ambient Air Quality Standards (NAAQS) for Ozone

On March 12, 2025, EPA announced a reconsideration of the NAAQS.

May 1, 2025

National Ambient Air Quality Standards (NAAQS) for Ozone

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