Summary:
On 4 December 2025, the French NGO Notre Affaire à Tous filed a climate case against the French government, alleging that it was failing to do its “fair share” to mitigate climate change. Drawing on the 2024 KlimaSeniorinnen judgment of the European Court of Human Rights and the 2025 climate advisory opinion of the International Court of Justice, the case seeks clarification from the Council of State on France’s equitable contribution to limiting climate change to 1.5°C in light of its historical responsibility and financial capabilities, and a finding that current French climate mitigation plans are insufficient. The case builds on previous litigation by the NGO against France and argues, as concerns human rights, that:
the national court is required to apply Article 8 of the ECHR, concerning the right to respect for private and family life, as interpreted by the European Court of Human Rights, and to set aside any legislative provisions that would be contrary to the Convention (own translation).
The applicants also invoke the State’s international law obligation to exercise due diligence (as clarified by the ICJ climate advisory opinion) and argue that France’s ‘fair share’ of mitigation action should be calculated according to principles of equity among nations, factoring in its historical emissions (since 1990); its imported emissions and net domestic emissions; and its level of economic development in line with the principle of common but differentiated responsibilities as enshrined in the Paris Agreement and the UNFCCC. This analysis, they argue:
shows that France is far below its equitable contribution to combating climate change, given its real impact. France has already consumed nearly all of its “fair share” of the global carbon budget compatible with the 1.5°C objective.
Case documents:
The petition (in French) and a press release are available for download below.
Suggested citation:
French Conseil d’État, Notre Affaire à Tous v. France (“Fair Shares Trial”), filed 4 December 2025 (pending).
Last updated:
24 June 2026.