Climate Litigation News and Case Updates | September 21-25, 2026

This page tracks the latest climate litigation news, including key rulings, new filings, and procedural developments from courts around the world. The Climate Court Litigation Tracker covers climate lawsuits, environmental and biodiversity cases, greenwashing claims, and corporate climate accountability litigation.

Updates are organised by the date rulings and/or updates were added to the Litigation Tracker. If you are looking for earlier updates and archived coverage, those are all available in the Resources section.

September 21

Canada:

• Canadian Court Allows Challenge to 2030 Climate Plan to Proceed: Climate Accountability; 2030 Emissions Plan; Judicial Review

United States:

• Environmental Groups Sue Over Air Permits for San Antonio Data Centers: Data Centers; Clean Air Act Permits; Gas and Diesel Power Generation

September 22

United States:

• Conservation Groups Challenge Second Federal Permit for California Coastal Oil Pipeline: Oil Pipeline Safety; Coastal Oil Spills; Federal Permitting

September 23

Kenya:

• Kenyan Court Strikes Out Challenge to Lifting of Logging Ban: Deforestation; Climate Change Risk; Res Judicata

Malaysia:

• Malaysian High Court Denies RimbaWatch Leave to Challenge Government Response to Shell’s Carbon Neutral Claim: Greenwashing; Government Enforcement; Judicial Review

United States:

• States Challenge Invenergy Offshore Wind Lease Buyout: Offshore Wind; Fossil Fuel Investment; Lease Cancellation

  
  

• States Challenge Bluepoint Wind Lease Buyout: Offshore Wind; Liquefied Natural Gas; Environmental Review

• California Challenges Buyout of Morro Bay Offshore Wind Lease: Offshore Wind; Lease Cancellation; Clean Energy Transition

  
  

• Michigan’s Renewable Energy Antitrust Suit Against Oil Companies Dismissed: Renewable Energy Competition; Fossil Fuel Industry; Antitrust Litigation

September 24

Brazil:

• Brazilian Court Convicts Samarco and Managers Over Mariana Dam Collapse: Corporate Criminal Liability; Mining Disasters; Environmental Accountability

United States:

• Conservation Group Seeks to Intervene in Maine Underwater Data Center Review: Data Centers; Marine biodiversity; Federal Permitting

September 25

European Union:

• Greenpeace and ÖKOBÜRO Challenge Austria’s Greenwashing Rules Through EU Complaint: Greenwashing; EU Consumer Protection; Directive Implementation

United States:

• Washington Supreme Court Strikes Down Natural Gas Initiative: Natural Gas; Building Electrification; Constitutional Challenge

• Ninth Circuit Rules Against Residents in Sea-Tac Jet Pollution Lawsuit: Aircraft Pollution; Clean Air Act Preemption; Aviation

Subscribers can access detailed case analyses, original pleadings, and real-time updates through the Climate Court Litigation Tracker. As climate litigation increasingly influences corporate conduct, regulation, and climate-risk governance, timely legal insight is essential for practitioners, businesses, investors, civil society, and policymakers.