Saint-Michel-en-Grève, once a beautiful beach in Brittany, is now plagued by pollution from agricultural runoff, untreated sewage, and plastic waste. The resulting contamination from green algae, fecal bacteria, and microplastics poses health risks and damages marine ecosystems. However, by adopting sustainable farming practices, improving wastewater treatment, and raising public awareness, there is hope to restore the beach and preserve its beauty for future generations.