In a landmark legal victory, the family of Jean-René Auffray has won a case linking his death to toxic green seaweed on the beaches of Brittany. Auffray, a 48-year-old ultra-marathon runner, collapsed and died in September 2016 while running near Saint-Brieuc. His body was found on a crust of dried seaweed, and the family spent a decade fighting to prove the seaweed was responsible.
The seaweed, Ulva armoricana, blooms due to high nitrate levels from intensive farming in Brittany, which houses over half of France's pig population on just 5% of its land. When it rots, it releases hydrogen sulphide, a gas that can be lethal in high concentrations. Since the 1970s, the algae has spread across the coast, killing wildlife and causing health scares.
Rosy Auffray, the widow, described the moment she realised the seaweed might have killed her husband. The family dog returned home covered in a foul-smelling slime, and the stench of rotten eggs led her to the mudflats. Despite initial suspicions of a heart attack, no autopsy was performed, and the authorities showed little interest in investigating the seaweed link.
Pierre Philippe, a retired emergency physician who has warned about the dangers for over 30 years, supported the family's case. He noted that the gas can cause unconsciousness and death, especially in enclosed areas. The case has drawn attention to the failure of successive French government action plans to tackle the seaweed problem effectively.
The court's decision marks a turning point for environmental accountability in France. Environmental NGOs have long pursued cases against the state over the 'seaweed affair', but this is the first time a family has successfully proved a direct link to a human death. The ruling could pave the way for further claims and stricter regulations on agricultural pollution.
