News & Analysis as of

California Clean Air Act Greenhouse Gas Emissions

Morrison & Foerster LLP

Federal Court Declines to Enjoin California Climate Disclosure Laws

On August 13, 2025, the U.S. District Court for the Central District of California declined to enjoin California’s two major climate disclosure bills, the Climate Corporate Data Accountability Act (SB 253) and the...more

Baker Donelson

Endangerment Finding Reconsidered as Clean Air Waivers Are Targeted

Baker Donelson on

California's unique ability to set its own vehicle emissions standards under Section 209(b) of the Clean Air Act (CAA) is facing unprecedented legal and political challenges. At the center of the controversy is Congress's...more

Alston & Bird

Change is in the Air for Greenhouse Gas Vehicle Emissions Standards

Alston & Bird on

Our Environment, Land Use & Natural Resources Group examines recent federal actions that may reshape federal greenhouse gas (GHG) vehicle emissions standards as well as California’s and other states’ authority to set and...more

Allen Matkins

California Environmental Law & Policy Update 8.1.25

Allen Matkins on

The U.S. Environmental Protection Agency (EPA) on July 29 proposed to repeal its landmark finding that greenhouse gas emissions endanger public health. The EPA’s so-called endangerment finding, issued in 2009, is a formal...more

ArentFox Schiff

Supreme Court Allows Fuel Producers to Contest California’s Emissions Rules

ArentFox Schiff on

For decades, California has been granted unique deference in setting Clean Air Act (CAA) emissions limitations for California-sold vehicles through use of a state-specific waiver....more

Jenner & Block

California Vehicle Waiver: Congressional Review Act Showdown

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The Congressional Review Act (“CRA”), enacted in 1996, allows Congress to disapprove federal regulations promulgated by government agencies within 60 legislative working days after the rule is submitted to Congress. In order...more

Allen Matkins

California Environmental Law & Policy Update 6.13.25

Allen Matkins on

The U.S. Environmental Protection Agency (EPA) moved this Wednesday to erase limits on greenhouse gases from power plants and to weaken restrictions on other hazardous power plant emissions, including mercury, arsenic, and...more

Holland & Knight LLP

Up in the Air: Congress Nullifies Clean Air Act Waivers for California

Holland & Knight LLP on

In the weeks since Holland & Knight previously reported on challenges to California's Clean Air Act (CAA) preemption waivers on April 30, 2025, Congress has taken decisive action. Following the U.S. House of Representatives'...more

Allen Matkins

California Environmental Law & Policy Update 5.9.25

Allen Matkins on

The House passed resolutions last week to rescind federal waivers that allow California to set stricter vehicle emissions standards than the rest of the country. California’s standards currently require the sale of most...more

Morrison & Foerster LLP

Advanced Clean Fleets Regulations No Longer in Force for Most Fleet Operators and Owners

In the face of the Trump administration’s hostility toward California’s Clean Air Act waivers in general, CARB withdrew its request to EPA for a waiver for the Advanced Clean Fleets (ACF) regulation on January 13, 2025....more

Allen Matkins

California Environmental Law & Policy Update 1.31.25

Allen Matkins on

The Trump administration has asked the U.S. Supreme Court to pause its review of a case involving California’s stricter vehicle emissions and electric vehicle standards. Acting Solicitor General Sarah Harris filed the request...more

Goldberg Segalla

California Withdraws EPA Waiver Request for Zero-Emission Advanced Clean Fleet Regulations

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California’s Air Resources Board (CARB) on Jan. 13 sent a letter to withdraw its request to the Environmental Protection Agency pursuant to Sections 209(b) of the Clean Air Act (CAA) for a federal waiver that would require...more

Allen Matkins

California Withdraws Clean Air Act Waiver Requests for Vehicle Emissions Standards

Allen Matkins on

On Monday, January 13, 2025, California withdrew requests for Clean Air Act waivers from the EPA needed to support four recently adopted vehicle emissions regulations: 1) the Advanced Clean Fleets Regulations; 2) the In-Use...more

Foley & Lardner LLP

Pumping the Brakes? Outlook for State and Federal Vehicle, Engine, and Equipment Emissions Standards

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Share on Twitter Print Share by Email Share Back to top With the start of the second Trump administration just over a week away, there are many uncertainties with respect to how the new administration will regulate vehicle,...more

Blank Rome LLP

SCOTUS Declines to Review California’s Clean Air Act Preemption Waiver—Current Implications and Expected Response from the...

Blank Rome LLP on

Update and Background - The U.S. Supreme Court, in Diamond Alternative Energy, LLC v. EPA, et al, recently declined to review whether the Environmental Protection Agency (“EPA”) exceeded its authority by granting a...more

Goldberg Segalla

SCOTUS Declines to Review EPA’s Authority on California’s Vehicle Emission Standards

Goldberg Segalla on

In a significant development for environmental law and state autonomy, the Supreme Court of the United States (SCOTUS) recently declined to review whether the U.S. Environmental Protection Agency (EPA) has the authority to...more

King & Spalding

EPA Approves Indirect Source Rule to Reduce Emissions from Warehouses in Southern California Air District, Potentially Paving the...

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On September 11, 2024, the U.S. Environmental Protection Agency (“EPA”) approved under the Clean Air Act (“CAA”) an indirect source rule that is intended to reduce emissions associated with warehouses located within the South...more

Proskauer Rose LLP

California Climate Disclosure Laws – New Developments, Old Timelines

Proskauer Rose LLP on

California Climate Disclosure Laws – New Developments, Old Timelines - The California legislature recently rejected Governor Gavin Newsom’s proposal to delay the deadlines to comply with California’s climate disclosure...more

Foley & Lardner LLP

The Rubber Meets the Road on State and Federal Vehicle Emissions Strategies

Foley & Lardner LLP on

March and April have been busy months for vehicle emission regulation in the U.S. On March 20 and March 29 respectively, the U.S. Environmental Protection Agency (U.S. EPA) issued a set of final emission rules setting...more

Quarles & Brady LLP

California’s New Climate Disclosure and GHG-Related Claims Laws

Quarles & Brady LLP on

On October 7, 2023, Governor Gavin Newsom signed into law a trio of climate-related bills that will impact what companies doing business in California must (or can) say about their greenhouse gas (GHG) emissions and the...more

Procopio, Cory, Hargreaves & Savitch LLP

Unpacking California's 2024 Zero Emission Fleet Mandate

Should state and local governments be concerned about California’s 2024 mandate to purchase zero emission fleet vehicles given that many of those vehicles do not yet exist? Procopio's John Lormon and Matt Abbot address...more

Allen Matkins

California Environmental Law & Policy Update - 4.07.23

Allen Matkins on

A Kentucky federal district court judge last Friday denied the state’s request to block the Biden administration’s new regulation redefining federally regulated “waters of the United States” (WOTUS) from taking effect within...more

Allen Matkins

California Environmental Law & Policy Update - July 2022

Allen Matkins on

Supreme Court restricts EPA's authority to mandate carbon emissions reductions - Associated Press - June 30 - In a blow to the fight against climate change, the Supreme Court on Thursday limited the extent of the U.S....more

Foley Hoag LLP - Energy & Climate Counsel

The Battle Over California’s Authority to Set Vehicle Emission Standards Continues

EPA, States, and the auto industry are again ratcheting up the battle over California’s authority to set vehicle GHG and Zero Emission Vehicles program. The Clean Air Act generally prohibits a state from adopting its own...more

ArentFox Schiff

EPA Restores California’s Clean Air Act Waiver, Allowing the State to Set Its Own Motor Vehicle Emissions Standards

ArentFox Schiff on

On March 9, 2022, the US Environmental Protection Agency (EPA) rescinded a rule promulgated by the Trump Administration and revived California’s Clean Air Act waiver, allowing the state to set its own greenhouse gas emissions...more

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