Give the causes of water pollution.

The causes of water pollution are as follows: Industrial activities and urbanisation: Industrial waste may be toxic, corrosive or reactive. If not managed properly, this waste can pose dangerous health and environmental consequences. Sewage is wastewater that often contains faeces, urine and laundry waste. Household waste includes dirt, soap, food, grease, and bodily wastes down the drain. Sinks, toilets, showers, and washing machines wastage may contain pathogens. Agricultural run-off and marine dump: Underground storage leakage, pesticides, animal dung, intensive farming also cause water pollution. If garbage is dumped into the ocean, the oxygen in the water could be depleted. This results in poor health for marine life Accidents: When we pour oil wastage in water, the oil forms a thick sludge in the water, as oil is insoluble in water. Nuclear waste may come from industrial, medical and scientific processes that use radioactive material.