WATER Pollution.Minamata disease:It is mercury poisoning that occurred in humans who ingested fish and shellfish contaminated by mercury discharged in wastewater from a chemical plant. The mercury was biotransformed by bacteria in the water into methylmercury, or organic mercury, that bioaccumulated and biomagnified in the muscle of fish. First, local cats that ate the fish began to stagger about and die.It was in May 1956, that it was first officially DISCOVERED in Minamata City, the southwest region of Japan's Kyushu Island.This disease is a neurological syndrome that happens because of mercury poisoning.Symptoms:Numbness in hands and feetDamage to speech and hearingMuscle weakness and loss of visionMinamata Convention on Mercury: The Minamata Convention on Mercury is a global TREATY to protect human health and the environment from the adverse effects of mercury.It was agreed at the fifth session of the Intergovernmental Negotiating Committee on mercury in Geneva, Switzerland on the morning of Saturday, 19 January 2013 and adopted later that year on 10 October 2013 at a Diplomatic Conference (Conference of Plenipotentiaries), HELD in Kumamoto, Japan. The Minamata Convention entered into force on 16 August 2017, on the 90th day after the date of deposit of the 50TH instrument of ratification, acceptance, approval, or accession. The Convention draws attention to a global and ubiquitous metal that, while naturally occurring, has broad uses in everyday objects and is released to the atmosphere, soil, and water from a variety of sources.