Which of the following dams is constructed in Gujarat?

Name two ancient water harvesting structures in Maharashtra.

List two main causes of the pollution of water of the river Ganga. State how pollution and contamination of river water prove harmful for the health of the people of neighbouring areas.

Khadins,Bundhis,Ahars and Kattas are ancient structures that are examples for

Opposition to the construction of large dams is due to

It is important to make small check dams across the flooded gullies because they
$(i)$ hold water for irrigation
$(ii)$ hold water and prevent soil erosion
$(iii)$ recharge ground water
$(iv)$ hold water permanently