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17/6/2011

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18 May 2011 Home page for water resources information from the US 1 Apr 2011 All about water - the U.S. Geological Survey's Water Science for Schools information site.We link donors to high quality partner organizations that help communities design and construct their own sustainable water supply systems. Water (H2O) is the most abundant compound on Earth's surface, covering about Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds.
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