Is it more than a numerical co-incidence that 70% of the earth is WATER and as much is the composition of water in the human body.
The overall water supply has decreased over the last 50 years due to the human population tripling, industrial pollution, unsustainable agriculture and poor civic planning. How can we increase the supply of fresh water to people around the world?
How much water do you really use every day?
How water becomes more salty?