1.
The higher level of floods and droughts are led by

2.
The careful management of water catchment areas results in

3.
The purification and removal of bacteria, solid materials and other impurities from used water is classified as

4.
The percentage of Earth surface which is covered by oceans and seas is

5.
The percentage of surface of Earth which is covered by water is

6.
The methods used for desalination are

7.
The planet which is also known as Blue Planet is

8.
Considering climate change, the increase in temperature leads to

9.
The sediment amount is increased in water due to

10.
The method of desalination in which molecules of water are forced to pass semi-permeable membrane is called