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Name: Roberto B.
Status: student
Age:  16
Location: N/A
Country: N/A
Date: 2000-2001
Question:
How does the air composition vary at different altitudes?

Replies:
Roberto -

The composition of the air is very consistent at lower altitudes. The only significant variation comes in the ozone layer which exists at higher altitudes (about 12 miles up... depending on the season and the position over the earth).

Larry Krengel



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