Mention any two s

The two sources of water pollution which are caused by human beings are-

a. Various forms of daily waste which are generated in sewers, pipelines and households is released into the rivers without being treated.

b. Industrial effluents, tonnes of which is produced every day, is released into the rivers/water bodies, causing a high degree of chemical damage.

OR

Watershed management and rainwater harvesting are two techniques adopted for water conservation in India.

Water is a natural resource. However, there is scarcity of water in many areas of India due to increase in population and pollution. Hence, there is a need to adopt different techniques to conserve the rain water for future use.