French Constitutional Court Blocks Reintroduction of Banned Pesticide, Citing Biodiversity Protection

Top French Court Upholds Environmental Charter

In a landmark decision on Thursday, August 7, 2025, France's highest court, the Constitutional Court, blocked a key provision of a contentious farming law that sought to reauthorize a previously banned pesticide. The ruling represents a significant victory for environmental advocates and underscores the nation's commitment to biodiversity protection.

The court specifically targeted a clause within the so-called 'Duplomb Law,' named after Senator Laurent Duplomb, which aimed to bring back the neonicotinoid pesticide acetamiprid. This insecticide had been banned in France since 2018 due to its harmful effects on pollinators like bees and other environmental concerns. The Constitutional Court found that the measure failed to adequately protect the environment and future generations, thereby infringing upon France's environmental charter, which holds constitutional value.

Concerns Over Biodiversity and Human Health

The court's decision highlighted the severe impact of neonicotinoids on the ecosystem. Its ruling explicitly stated that these 'plant protection products' have 'an impact on biodiversity, in particular for pollinating insects and birds, as well as consequences for the quality of water and soils and induce risks for human health.' This comprehensive assessment reinforced the scientific consensus regarding the dangers posed by such chemicals.

The 'Duplomb Law,' passed by the French parliament in early July 2025, was designed to loosen regulations for farmers and streamline agricultural projects. While supported by the government and major farming unions, it faced fierce opposition from scientists, health experts, and environmental groups. Farmers, particularly sugar beet growers, had advocated for acetamiprid's return, citing crop protection needs.

Public Outcry and Political Ramifications

The legislative attempt to reintroduce acetamiprid sparked a massive public backlash. A student-led petition against the law, initiated by Eléonore Pattery, garnered over 2.1 million signatures, making it one of the most signed petitions in French history. This overwhelming public sentiment likely played a role in the court's decision, demonstrating strong societal demand for environmental safeguards.

The ruling is considered a significant setback for President Emmanuel Macron's government, which had defended the bill. Left-wing politicians and environmental organizations have hailed the decision as a triumph for democracy and the planet, with some lawmakers vowing to push for a full repeal of the remaining parts of the 'Duplomb Law.' While acetamiprid remains approved by the European Union until 2033 and is authorized in other member countries, France's Constitutional Court has set a strong national precedent for environmental protection.