Question

71 percentage of the earth is covered by water, but very little are used by human. why?

Answer 1

because only nearly about 1% of water is suitable for drinking rest other contains sea salt and other impurities

Answer 2

Although 71 percentage of the earth is covered by water, but very little are used by human.

The reason being 97% of the water it is in the oceans.

And the water of ocean is salty, hence it can’t be used for drinking.

2% of the water is in the form of glaciers and snow, which is also a waste.

And the remaining 1% is available for humans.