The 'Stop Bélénos' collective, an environmental group in France, is contesting a mining exploration permit that was granted by the French Ministry of Economy (Bercy) for a project located in the Loire-Atlantique and Maine-et-Loire regions. The group's primary concern is that the exploration activities may negatively impact the water resources and underground aquifers in the 18 municipalities affected by the project, which covers a significant area of 440 square kilometers.

The collective has filed a summary request with the administrative court in Rennes, challenging the ministerial order issued on December 3, 2025, which allowed Breizh Ressources to conduct exclusive mining research under the name 'Bélénos'. This initiative highlights the growing opposition to mining projects that are perceived to threaten local ecosystems and supply of freshwater in agricultural and rural areas of France, a country known for its rich biodiversity and environmental sensitivity.

The regions of Loire-Atlantique and Maine-et-Loire are characterized by their rural landscapes, agricultural activities, and a rich network of hedgerows and vineyards. As concerns about environmental sustainability and water management intensify, the actions of the 'Stop Bélénos' collective may influence broader discussions and policies regarding mining practices in France, prompting other local governments and communities to take a stand against similar threats to their natural resources.