Summary:
On 21 April 2021, the plaintiffs in this case (Klimatická žaloba ČR, an NGO established for the purpose of climate litigation; the Municipality of Svatý Jan pod Skalou; the Czech Ornithological Society; and four individuals) initiated a civil action against unlawful interference, naming four ministries of the Czech government and the Czech government (cabinet) as defendants. They contested failures to provide adequate and necessary mitigation and adaptation measures to protect against the adverse effects of climate change. They also alleged that the Czech government’s failures to adequately address climate change had violated the rights to life, health, a healthy environment, and other rights guaranteed by the Czech constitution, the Czech Charter of Fundamental Rights and Freedoms, and the European Convention on Human Rights. They alleged that this interference was constituted by their failure to implement concrete measures for the mitigation of climate change, based on international law (in particular, the Paris Agreement), EU law, and Article 35 of the Czech Charter on Fundamental Rights (Charter), which provides for the right to a favourable environment.
The plaintiffs sought a declaration that the Czech government failed to respect their rights by ensuring sufficient emissions reductions to meet the Paris Agreement’s targets. They also sought an order setting the Czech carbon budget at 800 Mt CO2 from January 2021 until the end of the century.
The plaintiffs were initially successful before the Municipal Court of Prague, whose judgment was subsequently annulled by the Supreme Administrative Court of the Czech Republic. On 5 February 2025, the plaintiffs filed a constitutional complaint before the Constitutional Court of the Czech Republic alleging violations of several rights under the Charter and Articles 2, 8 and 6 of the European Convention on Human Rights (ECHR).
Procedural History
The first instance the plaintiffs approached was the Municipal Court in Prague. On 15 June 2022, the Municipal Court rendered a judgment in favour of the plaintiffs, declaring that each of the four ministries had unlawfully interfered with the applicants’ right to a favourable environment under of Article 35 of the Charter, on the grounds that they had not undertaken measures for the state to achieve a 55% reduction in greenhouse gas emissions by 2030, compared to 1990 levels. It held that the claims against the cabinet as inadmissible as it did not constitute an ‘administrative authority’ against whom claims of unlawful interference could be brought under the Czech Code of Administrative Justice.
Both the parties appealed against this judgment. The defendant ministries (appellants) argued that the Municipal Court exceeded its competence in breach of the separation of powers doctrine and interpreted EU and international law incorrectly. The plaintiffs (cross-appellants) argued that the Municipal Court erred in declining the cabinet’s capacity to be sued and ought to have prescribed a more ambitious mitigation target than the 55% target for the Czech government to achieve. On 20 February 2023, the Supreme Administrative Court (SAC) overruled the Municipal Court’s decision on account of the separation of powers doctrine and found that it incorrectly interpreted the EU climate target (entailing 55% emission reduction by 2030) as EU law does not prescribe a specific mandatory emissions reduction target for the Czech Republic alone. Since this was a cassation appeal, the SAC remanded the case to the Municipal Court. Following a remand and a subsequent dismissal by the Municipal Court, the plaintiffs’ final appeal to the SAC was unsuccessful.
Claims
The plaintiffs thus filed a complaint before the Constitutional Court of the Czech Republic, seeking an annulment of the SAC and Municipal Court decisions on account of violations of their rights under Articles 6, 10, 11, 26, 31, 35 and 36 of the Charter and Articles 2, 6 and 8 of the ECHR.
In support of their arguments, the plaintiffs relied on climate jurisprudence from the Netherlands, France, Germany, Ireland, Nepal, Colombia, and most importantly, the Grand Chamber of the European Court of Human Rights, which emphasize the judiciary’s role in reviewing the state’s mitigation policy based on human rights law. They also placed heavy reliance on the interpretation of Article 8 of the ECHR laid down in the case of Verein KlimaSeniorinnen and Others v. Switzerland to challenge the lack of a national carbon budget for the Czech Republic, a climate neutrality target, and binding intermediate emission reduction targets. Furthermore, they problematized the SAC’s use of European Climate Law (which provides for a framework for emissions reduction targets to be achieved by EU member states collectively) as a shield against the plaintiffs’ human rights claims against the Czech Republic.
Judgment
On 22 October 2025, the Constitutional Court issued its ruling wherein it dismissed the plaintiffs’ requests by emphasizing on the form of action they used to bring the claim before the Municipal Court (and SAC). Under the Code of Administrative Justice, the administrative authorities in question could only be regarded as having produced an unlawful interference by failing to implement their statutory duties. The Court found the plaintiffs had not proven how the ministries could adopt the requested measures within their existing legal authorizations. It also held that neither the Constitution nor the ECHR specifically obligate the four named ministries to adopt the measures requested by the applicants.
Regarding the KlimaSeniorinnen judgment, the Constitutional Court held that while the ECtHR is an international court which assesses the actions of the state as a whole, its own role was limited to examining the conduct of the named defendant ministries. Finally, it held that the administrative courts did not violate the plaintiffs’ right of access to the court (Article 36 of the Charter, and Article 6 of the ECHR) as it found the courts to have examined each of their submissions and ruled on the entire subject matter of the proceedings.
Status:
The Constitutional Court ruling is final and cannot be appealed.
On 2 February 2026, the NGO Klimatická žaloba ČR submitted an application to the ECtHR alleging violations of Articles 8, 6 and 13 of the ECHR.
Links:
The ruling of the Constitutional Court of the Czech Republic can be found here.
The Municipal Court of Prague Judgment from 15 June 2022 (finding in favour of the plaintiffs) can be found here (Czech) and here (unofficial English translation).
The decision of the Supreme Administrative Court of the Czech Republic (SAC), annulling the Municipal Court of Prague Judgment from 15 June 2022, dated 20 February 2023 can be found here (Czech).
The Municipal Court of Prague Judgment from 25 October 2023 (upon remand of the case from the SAC) can be found here.
The second decision of the SAC dated 26 November 2024 (dismissing the plaintiffs’ appeal) can be found here.
All other case related documents can be found on the website of the NGO Klimatická žaloba.
Suggested citation:
Constitutional Court of the Czech Republic, Klimatická žaloba ČR, z.s. and Others v. Ministry of the Environment, Ministry of Industry and Trade, Ministry of Agriculture, and Ministry of Transport, Czech Republic, Pl. ÚS 6/25, 22 October 2025, Judge Veronika Křesťanová (judge rapporteur).
Last updated:
12 March 2026.
