Water is the world's life source and essential to all living creatures. Although we live on the blue planet, only 3 percent of all our water is drinkable. Yet we've grown accustomed to using it with abandon - individuals consume about 80 to 100 gallons per day adding up to the equivalent of an Olympic sized swimming pool every year. By this decade's end, when the world population is predicted to reach 8 billion, we will face severe shortages. In this...
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Nature