Answers

2014-03-04T21:19:50+08:00
TROPOSPHERE : is the lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere.
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2014-03-04T22:52:49+08:00
Maybe you meant, Troposphere? Troposphere is the lowest layer of earth :) 
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