Hungary toxic sludge reaches Danube River: Top 10 environmental disasters worldwide

2. Minamata Bay mercury, ended in 1968

For more than 30 years, a Japanese company released water containing high levels of mercury into the bay around the Japanese city Minamata. The mercury seeped into the marine food chain, reaching residents through ingestion of local fish. More than 1,700 people have died from a neurological condition named after the company and city.

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