Question

Give reason for the following :
1.Water should be used judiciously ,though 71%of the earth's surface is covered with water.

Answer 1

Drinkable Or portable water is present in a limited quantity.Though , the water of ocean is salty and it is not fit for our health.

Answer 2

because the 71% water is present to us in salty water and only 29% of water is present to us water in glaciers,rivers,lakes,ponds,underground water and fresh water