Biden's New Tailpipe Emissions Rule Resets to Obama Administration Standards

The Biden administration finalized greenhouse gas (GHG) emissions standards for passenger cars and light trucks that almost fully erased changes by the Trump administration that, in turn, erased a rule finalized by the Obama administration.

2 minute read

December 21, 2021, 5:00 AM PST

By James Brasuell @CasualBrasuell


Joe Biden exits a limousine, surrounded by security and staffers, on the way to the Marine One helicopter on a pad near the water in New York City.

Marc A Sherman / Shutterstock

The Environmental Protection Agency (EPA) on Monday announced new federal greenhouse gas (GHG) emissions standards for passenger cars and light trucks for model years 2023 through 2026. A U.S. Environmental Protection Agency rule summary announced the finalized standards. According to the rule summary, the new standards are consistent with the "Strengthening American Leadership in Clean Cars and Trucks" Executive Order signed by President Joe Biden in August 2021.

An article for The Washington Post, by Dino Grandoni, Faiz Siddiqui, and Anna Phillips, provides more details on the announcement, headlining a comparison between the newly finalized rule and the actions of the previous administration. To describe the details of the new rule, the article includes this summary:

The standards for model years 2023 to 2026, signed Monday morning by EPA Administrator Michael Regan, require that cars, SUVs and pickup trucks release an average of 161 grams of carbon dioxide per mile by 2026. The new Biden standards are equivalent to an average of roughly 55 miles per gallon by 2026 in laboratory testing. The average figure appearing on window stickers — and advertised EPA mileage — would be 40 mpg.

While those standards appear drastic, they don't erase the rollback of emissions standards imposed by the Trump administration. Obama-era rules "would have achieved nearly the same emission cuts a year earlier," according to the article.

The article also notes that the new emissions standards fall short of the lofty ambitions of the Build Back Better bill, which was delt a final blow by U.S. Senator Joe Manchin (D-West Virginia) a few days earlier.

The new limits on tailpipe emissions for the next four years mark President Biden’s biggest step yet to tackle climate change, but the move comes as critical components of his plan for an all-electric future just suffered a major blow on Capitol Hill. On Sunday, Sen. Joe Manchin (D-W.Va.) announced he would not support his party’s Build Back Better plan, which would have provided billions in federal support for building charging stations and encouraging consumers to buy electric vehicles.

Monday, December 20, 2021 in The Washington Post

portrait of professional woman

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 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 Planner

Get top-rated, practical training

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 16, 2025 - Diana Ionescu

Bird's eye view of large apartment complex under construction next to four-lane road near Atlanta, Georgia.

How Atlanta Built 7,000 Housing Units in 3 Years

The city’s comprehensive, neighborhood-focused housing strategy focuses on identifying properties and land that can be repurposed for housing and encouraging development in underserved neighborhoods.

April 9, 2025 - Governing

People walking up and down stairs in New York City subway station.

In Both Crashes and Crime, Public Transportation is Far Safer than Driving

Contrary to popular assumptions, public transportation has far lower crash and crime rates than automobile travel. For safer communities, improve and encourage transit travel.

3 hours ago - Scientific American

White public transit bus with bike on front bike rack in Nashville, Tennessee.

Report: Zoning Reforms Should Complement Nashville’s Ambitious Transit Plan

Without reform, restrictive zoning codes will limit the impact of the city’s planned transit expansion and could exclude some of the residents who depend on transit the most.

4 hours ago - Bloomberg CityLab

An engineer controlling a quality of water ,aerated activated sludge tank at a waste water treatment plant.

Judge Orders Release of Frozen IRA, IIJA Funding

The decision is a victory for environmental groups who charged that freezing funds for critical infrastructure and disaster response programs caused “real and irreparable harm” to communities.

5 hours ago - Smart Cities Dive