Thick Layer of Toxic Foam Forms Over Yamuna In Delhi

Amid deteriorating air quality in New Delhi, Yamuna river has been covered by a thick layer of toxic foam. Experts believe the foam is due to the untreated discharge of phosphate-rich detergents used in dyeing industries, dhobi ghats and households. The detergents settle at riverbed during normal course, but when extra water is released, churning creates foam. Another cause could be the gas released by bacteria, which get activated during less availability of oxygen.