The water - bearing layer of the earth is called 

Chemical used to disinfect water. 

Roots respire through 

Percentage of fresh water available on the globe

Which natural process continuously converts some of the saline sea water into freshwater? 

Dried sludge is used as

World water day is on 

The water bearing layer of the earth is called 

The minimum amount of water recommended by the United Nations per person per day is

The process of water seepage into the ground is called