Climate Litigation News Updates | December 1-5, 2025

The latest climate litigation news and case developments are added on a rolling basis to the Climate Court litigation tracker, giving you continuous access to the most important climate lawsuits, environmental protection disputes, biodiversity cases, and climate-related litigation worldwide. Our global database brings together expert case summaries, primary court documents, judicial decisions, and live updates from national and international courts.

Whether you follow corporate climate accountability claims, challenges to government climate policy, or climate-related human rights litigation, Climate Court helps you stay ahead of the legal developments shaping climate and environmental law.

Below you’ll find this week’s latest climate litigation updates, organised by day to make it easy to track the most recent filings, rulings, and procedural milestones. This page is refreshed daily as new climate cases emerge across jurisdictions. For earlier coverage, you can explore prior weeks on our Resources page.

Here’s a snapshot of the newest updates added this week:

December 1

Europe:

• ClientEarth Files EU State Aid Complaint Against Germany’s Billion-Euro Gas Power Plant Subsidy Plan: ClientEarth has lodged a formal EU state aid complaint against Germany over its decision to subsidise billions of euros in new gas-fired power plant capacity.

December 2

Canada:

• Climate Appeal Launched After Saskatchewan Court of King's Bench Blocks Challenge to SaskPower Gas Power Plants: The climate case is now headed to the Saskatchewan Court of Appeal, keeping legal scrutiny on new gas power infrastructure and energy transition obligations.

United States:

• Connecticut Court Lets Exxon Mobil Corp. Greenwashing and Deception Lawsuit Proceed Under State Consumer Law: The ruling allows the consumer protection case to move forward, focusing on alleged deceptive environmental marketing, climate misrepresentation, and greenwashing under state unfair trade practices law.

• Utah Youth Sue Utah Division of Oil, Gas, and Mining Over Dozens of New Fossil-Fuel Permits as Unconstitutional Climate Harm: The youth-led constitutional climate lawsuit challenges the permitting of oil, gas, and coal projects on the grounds of climate pollution, public health, and intergenerational rights.

December 3

United Kingdom:

• UK Advertising Regulator Bans Lacoste, Nike, and Superdry “Sustainability” Ads as Misleading Greenwashing: In a coordinated crackdown on fashion sector greenwashing, the UK's advertising regulator upheld complaints against Lacoste, Nike, and Superdry for making unqualified “sustainable” and “sustainable materials” claims.

  
  

United States:

• New Jersey Appeals Court Revives $1B PFAS Cleanup Suit Against DuPont and Chemours: The ruling strengthens citizen-suit enforcement under New Jersey’s Environmental Rights Act and keeps alive major PFAS contamination claims tied to decades of industrial pollution along the Delaware River.

• Massachusetts Customers File Class Action Accusing CleanChoice Energy of Deceptive Renewable Energy Claims: The lawsuit targets alleged greenwashing and predatory pricing in the deregulated retail electricity market, raising consumer protection, false advertising, and unjust enrichment claims against CleanChoice Energy.

December 4

France:

• Notre Affaire à Tous Sues France Over Failure to Meet Its Fair Share of Global Climate Action: Notre Affaire à Tous has filed a new climate lawsuit against France, arguing that the country’s emissions cuts, financing policy, and fossil fuel regulation fall short of its equitable “fair share” under international climate law.

Germany:

• Federal Administrative Court Orders New Permit for Deutsche ReGas’s Mukran LNG Terminal Over High-Output Ship Engine Power Use: Germany’s Federal Administrative Court ruled that Deutsche ReGas must obtain a new emissions control permit.

December 5

United States:

• West Virginia Residents Sue to Halt Adams Fork Energy Project Over Missing Federal Permits and Endangered Species Violations: West Virginia residents have sued to stop the Adams Fork Energy Project, arguing TransGas is advancing a massive gas-powered ammonia facility without required federal permits under the Endangered Species Act, Clean Water Act, and NEPA.

• Environmental Groups Sue Trump EPA Over Unlawful Delay of Methane Pollution Standards: Environmental and public-health groups have taken the Trump EPA to court for delaying the 2024 methane standards, a move they say will fuel climate pollution and endanger communities near oil and gas operations.

All of this week’s climate litigation updates are available in full in the Climate Court litigation tracker, where subscribers can access in-depth summaries, original court filings, and real-time tracking of climate and environmental lawsuits from around the world.

Monitoring climate litigation is increasingly vital for businesses, legal professionals, NGOs, investors, and policymakers, as court decisions now directly influence corporate sustainability strategies, regulatory compliance, and climate risk management. Staying informed allows companies to anticipate legal exposure, enables lawyers and consultants to guide clients effectively, and helps the wider public follow how climate litigation is driving accountability and environmental justice worldwide.