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About the Atmosphere
 The atmosphere (above) is a blanket of protective gases around the Earth providing insulation against otherwise extreme alternations in temperature. The gravitational pull of the Earth increases the density nearer the Earth's surface so that 5/6ths of the atmospheric mass is in the first 15 kms. It is a very thin layer in comparison with the Earth's diameter of 12 680 kms.
 © Copyright 2002, 2003 Seelendran Naidoo All rights reserved.
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