According to statistics, only 3.5% of the water on Earth is fresh water that we can drink. And most of that fresh water, 68%, is trapped within ice and glaciers. Finding ways to increase the amount of potable water and clean H2O for other purposes is a current major concern. 

Water is so essential to life, that it ranks second in the Rule of Three. It is said that a person can live three minutes without air; three days without water; and three weeks without food.

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