In Spain, how nutrients poisoned one of Europe's largest saltwater lagoons

A fisherman all his life, 50-year-old Pedro Martinez-Banos grew up along the shores of Spain's Mar Menor in the southeastern coastal region of Murcia, casting out his nets to bring in a catch to support his family. 2019 had been a very good year for him, his small boat bringing in about 100 kilos per day. But on October 12, it all changed when millions of fish and crustaceans washed up on the Mar Menor's northern shores, dead or dying.