Hi
I have seen a claim in print some 7 years or more ago that volcanic eruptions particularly in South America are responsible for many thousands of tonnes of chlorine in the upper atmosphere and that their contribution to atmospheric chlorine far exceeds the contributiion from CFC's. Even though CFC's may be more catalytic in nature than ordinary chlorine the main culprit suggested as being responsible for ozone destruction in this article published recently appears to be chlorine created from CFC's which if the older information is true would seem to be a misleading statement. Also why is it that so much publicity is given over to the ozone hole over the antarctic when a simillar hole perhaps affecting more human life is created over the arctic each year. If this hole is smaller then would it be reasonable to assume that there a correlation with less volcanic activity in that hemisphere?
PRD