Approximately what percentage of groundwater do we utilize?

Find out about the traditional systems of water harvesting/management in your region.

In our country,there are attempts to increase the height of several existing dams like Tehri and Almati,dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams:
$(i)$ Terrestrial flora and fauna of the area is destroyed completely.
$(ii)$ Dislocation of people and domestic animals living in the area.
$(iii)$ Valuable agricultural land may be permanently lost.
$(iv)$ It will generate permanent employment for people.

Opposition to the construction of large dams is due to

State the main purpose of water harvesting management and mention the source which fills the ponds behind harvesting structures.

How can you as an individual contribute or make a difference to the management of water resources?