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'Minamata disaster' in Japan was caused by pollution due to

  • A.Lead
  • B.Mercury
  • C.Cadmium
  • D.Zinc

Answer: B

The Minamata disaster in Japan (first recognised in 1956) was caused by mercury, discharged as methylmercury in the waste water of a chemical factory into Minamata Bay. It built up in fish and shellfish eaten by the people and caused a severe neurological disease. Lead, cadmium and zinc are not the cause of this disease, although cadmium caused the Itai-itai disease in Japan. The answer is mercury.

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