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The Biological Importance of Water
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| Submitted: Thu Jul 11 2002
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Watery World Water, water, everywhere, Nor any drop to drink. As said by Samuel Coleridge in "The Rhyme of the Ancient Mariner" water is everywhere. Our planet's name - Earth - cannot be taken for face value because in reality the "Earth" is covered by more than 70% water. To be exact there is approximately 326 million cubic miles of water on Earth. In order to appreciate and envisage such an enormous amount you have to put it into perspective. Out of all the water on Earth, only 0.3% of it is usable by humans. The other 99.7% is unusable in oceans, seas, ice and the atmosphere. And even out of that 0.3%, most of it is out of our reach. But what is water? Water is a substance whose molecule is made from two 1hydrogen atoms and one 16oxygen atom (H20) and that is in a liquid state at room temperature. It boils...
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