Water pollution and its control
Pollution · Biology
Study notes
The Ganga at Kanpur ran black with tannery effluent — the Ganga Action Plan (1986) and Namami Gange (2014) fight industrial sewage. Yamuna in Delhi is 90% sewage — its BOD so high fish can't survive; only the floodplain's wetlands filter it. Minamata (Japan) — mercury poisoning deformed generations; Bhopal's gas tragedy contaminated groundwater for decades. Your RO purifier battles dissolved salts — household water control.