From the telegraph:

“…The places under threat include some of the area’s most popular resorts. Bays popular with Britons from Mont-Saint-Michel along the Atlantic coast all the way to La Baule, a top summer beach destination, are now struggling to dispose of thousands of tons of Ulva lactuca – more commonly known as sea lettuce.

Doctors have warned that the algae pose a health risk as they produce hydrogen sulphide when they rot. That can become trapped under a seaweed crust and be as deadly as cyanide if released suddenly.

Two weeks ago, a horse rider lost consciousness after breathing in the toxic fumes on the beach in Saint-Michel-en-Grève, where 16,000 tonnes of the algae have already been collected this year. His horse was killed.

Pierre Philippe, of the Lannion hospital in Brittany, which also treated a council worker who fell into a coma while clearing beaches, said there were “almost certainly other unreported cases”. The seaweed has been multiplying abnormally fast due to the use of huge amount of nitrates used in intensive pig and poultry farming. The nitrates seep into the region’s rivers and end in the sea. Scientists said global warming could also be a factor.

The worst affected area is Saint-Brieuc on the Côtes-d’Armor coast of Brittany. Besides Saint-Michel-en-Grève, around ten beaches have…”

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