Ive heard that the amount of chlorine put into the atmosphere is by natural sources like volcanoes and sea spray is many times larger that from CFCs?
This statement is actually true in one respect but false in another. The amount of chlorine put into the atmosphere by sea spray is very large. Of course, the chlorine is in the form of dissolved salt or sodium chloride. This chlorine is in big droplets or particles that do not stay in the atmosphere very long because they fall back to earth or are swept out of the air by rain. Therefore, this chlorine does not stay in the atmosphere long enough to get mixed up into the stratosphere. Only chemicals that stay in the atmosphere for many years can be mixed into the stratosphere, and for this reason CFC’s are the chemicals that carry most of the chlorine into the stratosphere.
