Question

Explain any five methods to prevent water pollution in India.

Hint:

Urban rivers like Yamuna get polluted mainly due to untreated domestic sewage and solid waste dumping in cities.

Answer 1

The Yamuna River in Delhi is heavily polluted. This is mainly caused by the discharge of untreated domestic sewage and waste directly into the river. This untreated wastewater significantly degrades water quality by increasing organic pollution.
Flood water spreading (A): Has a minimal impact on pollution compared to direct waste disposal.
Dumping of domestic waste (B): Is the primary source of pollution. It leads to reduced dissolved oxygen levels and adversely affects aquatic ecosystems.
Use of pesticides (C) and fertilizers (D): Primarily impact water bodies through agricultural runoff, which is less significant in contributing to Delhi's urban pollution.Therefore, the correct answer identifying the main cause of pollution is (B): Dumping of domestic waste.