Age of Ozone Layer
Name: Sam P.
Date: June 2002
How old is the earth's ozone layer?
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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Update: June 2012