[cogitator]

Antartica has a volcano that spews chlorine and flourine gases directly into the air in the south pole. The hole seems to wax and wane with volcano's activity.

Not true. Erebus, the volcano in question, emits typical volcanic volatiles, including HCl and HF. These do not reach the stratosphere; they are rapidly removed from the atmosphere by precipitation (rain and snow) and neutralized in the ocean.

The chlorinated chemical species in the stratosphere that cause ozone destruction result from the breakdown of chlorinated chlorofluorocarbons (CFCs) in the upper atmosphere.

[<1/1,000,000th%]

I stand corrected. There is a long, way too technical summary here;

cfc's