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Historisk iltsvind i Østersøen
Døde zoner i Østersøen har bredt sig til et omfang, der ikke er set lignende i mindst 1.500 år, viser et nyt studie. Forskerne mener, at det udbredte iltsvind skyldes næringsstoffer fra landbruget og kloakker.
Læs hele artiklen på The Guardians hjemmeside.