EPA Plans “Largest Deregulatory Action” in History

The agency plans to repeal a key 2009 rule that underpins the government’s authority to regulate greenhouse gas emissions.

1 minute read

August 3, 2025, 5:00 AM PDT

By Diana Ionescu @aworkoffiction


Door of government building with gold Environmental Protection Agency title.

Tada Images / Adobe Stock

The Environmental Protection Agency (EPA) plans to revoke the 2009 declaration known as the ‘endangerment finding,’ a foundation of the government’s effort to fight climate change.

As Maxine Joselow and Lisa Friedman explain in the New York Times, the finding established that greenhouse gases pose a threat to public health. “The Obama and Biden administrations used that determination to set strict limits on greenhouse gas emissions from cars, power plants and other industrial sources of pollution.”

Without the endangerment finding, the E.P.A. would be left with no authority under the Clean Air Act to regulate the greenhouse gas emissions that are accumulating in the atmosphere from the burning of fossil fuels.

EPA administrator Lee Zeldin called the change “the largest deregulatory action in the history of the United States,” adding that the decision would eliminate limits on emissions for cars and trucks, among other regulations. In the United States, transportation emissions are the largest source of greenhouse gases.

The EPA cited a report from five scientists “known for their rejection of the overwhelming scientific consensus on climate change” that claims climate change models exaggerate warming and that carbon dioxide has overall positive effects because of its usefulness to plants.

Tuesday, July 29, 2025 in The New York Times

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

Skyscrapers in Jersey City.

New Jersey’s second-largest city bans standalone data centers

Jersey City will continue to allow co-location facilities, such as those meant for research institutions that store their own data.

September 4, 2026 - The Cool Down

A New Jersey train approaches people waiting at the station.

Amtrak not solely to blame for New Jersey commuter rail's unreliability, report finds

A new study from the Garden State Initiative found that NJ Transit’s budget grew 20% across a 4 year period, but reliability declined significantly over the same period.

September 15 - Mass Transit

A tall, gray power plant billows smoke into a blue sky.

EPA erases limits on planet-warming pollution from power plants

Under Monday’s plan, power plants would still have some limits on how much mercury, arsenic and other contaminants they can emit.

September 15 - New York Times

A white RAPID bus. The lower half is light blue, and says RAPID in purple text. The bus is half visible, appearing from the left side of the image.

Phoenix announces new on-demand transit service, more frequent RAPID buses

Both new services will launch in October, and are part of Phoenix's Project Effective Access Solutions for Easing Congestion.

September 15 - KJZZ

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.