- Chlorine- and bromine-containing chemicals are the main causes of ozone depletion. Chlorofluorocarbons (CFS) were formerly found in a wide range of aerosol products, refrigerants, and insulations such as Styrofoam. The
- Explosive volcano eruptions can delay the restoration of the ozone layer due to sulfur being released into the atmosphere. (Q14)
- Stratospheric ozone itself is a greenhouse gas, so ozone depletion actually has a contribution against the greenhouse effect. This contribution is negligible, however, when the major sources of greenhouse gases are taken into consideration. So it would be not be a good idea to favor ozone depletion. (Q18)
- In 2002, the ozone hole took an unusual shape due to a weather system that warmed stratospheric air earlier than normal (see picture [Q11])
- There has also been a thinning of the Arctic ozone layer, but it is not as drastic as in the Antarctic because the Antarctic is colder. (Q12)
Source: http://ozone.unep.org/Assessment_Panels/SAP/Scientific_Assessment_2010/SAP-2010-FAQs-update.pdf
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