70% of our earth is covered with water so it can be assumed that there would not be any shortage of water for us but this is not true because only 3% of water is freshwater and out of that 2% is in glaciers which is not usable until they melt.
As the ground level water is going down and rivers are losing their identity due to pollution and environmental change it is estimated that two-third of the population by 2025 will face water scarcity. So out of 3 two people will suffer from water shortage.