Ley 19/2022 para el Reconocimiento de Personalidad Jurídica a la Laguna del Mar Menor y su Cuenca

The Ruling

Spain's Cortes Generales enacted Law 19/2022 (Senate vote 230–3) recognising the Mar Menor lagoon and its basin as a legal person with the rights to exist, evolve naturally, be protected, conserved, and restored. Any natural person has standing to defend those rights in court. On 20 November 2024 the Spanish Constitutional Court upheld the law against challenges by VOX and the regional government of Murcia, making Mar Menor the first EU ecosystem whose personhood has survived constitutional review.

The Personhood Argument Not Made

Mar Menor is the European answer to the Lake Erie problem. Where a U.S. municipal charter was struck down for ultra vires, a Spanish national statute did the same work and survived. The case reveals that the obstacle to ecosystem personhood in the United States is not metaphysical but federalist — it is the question of which sovereign may grant personhood, not whether any may. Mar Menor also originated as a citizen initiative gathering 640,000 signatures, making it the first popularly-initiated personhood grant in Europe.

The Execution Gap Created

Between 2016 and 2021, fertilizer runoff produced eutrophic 'green soup' that killed thousands of tonnes of marine life. The 2022 law established standing; the 2023 Cartagena criminal proceeding (the first to invoke it) charged mining-waste discharges. Phosphorus loading from the Campo de Cartagena agricultural basin remains the binding constraint, and no enforcement order has yet reduced it to ecologically tolerable levels.

Primary sources & research

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Related cases

• Flint Water Crisis (Mays v. Snyder et al.) (2015)
• Shelley v. Kraemer (1948)
• Te Awa Tupua (Whanganui River Claims Settlement) Act 2017 (2017)
• Sierra Club v. Morton (1972)

Part of The Personhood Prism, the companion to The Execution Gap by Thomas William Hornig. See all personhood cases →