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What's in our water: The future looks dry

Climate change means more drought and water shortages, making modern purification technologies such as desalination and recycling sewage crucial in ensuring supply meets demand.

According to the Why Files, more than one sixth of the world's population lacks access to potable water due to problems traced to shortage. And according to World Health Organization figures, up to half of the world's population suffers disease associated with water pollution at any given time that can be traced to water shortage. Water supply is smallest in equatorial countries, where populations are rising.

Still, as pointed out by this site devoted to the concept of conservation via rain barrels, it is a common belief in many parts of the world that water is an infinite resource to exploit as needed. But its value is becoming clearer as the well begins to run dry in arid parts of the U.S. where most of the municipal water comes from overstressed underground aquifers.

Much of the small amount of freshwater from lakes, rivers and streams is in danger of drying up through desertification or becoming so contaminated that it cannot be used for human consumption. Changing our habits of water use can help to abate this growing problem. For more information on world water consumption, you can review this government website.

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