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Name: Sam P.
Status: Student
Age: 20s
Location: N/A
Country: N/A
Date: June 2002


Question:
How old is the earth's ozone layer?



Replies:
Sam,

I do not know how many millions of years it may have been since the ozone layer was produced, but it has been there surely since before man began. The protection of the ozone layer is needed for all plant and animal life, so it is hard to conceive of there having been much life of any advanced type before the ozone layer existed.

David R. Cook
Atmospheric Research Section
Environmental Research Division
Argonne National Laboratory



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