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This article is from the Ozone Depletion: Stratospheric Chlorine and Bromine FAQ, by Robert Parson rparson@spot.colorado.edu with numerous contributions by others.

22 Sea salt puts more chlorine into the atmosphere than CFC's.

True, but not relevant because this chlorine is in a form (HCl) that
is rapidly removed from the troposphere. Even at sea level there is
more chlorine present in organic compounds than in HCl, and in the
upper troposphere and lower stratosphere organic chlorine dominates
overwhelmingly. See section 2.1 above.

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