Volcanoes cause ozone depletion but very less. They release chlorine which can deplete small amount of ozone.
See "What is causing the depletion of the ozone layer?"
See "What is causing the depletion of the ozone layer?"
See "What is causing the depletion of the ozone layer?"
Depletion is the removing of ozone from the layer. CFC cause it.
Volcanos release chlorine and bromine which react with ozone. This depletes ozone layer.
See "What is causing the depletion of the ozone layer?"
See "What is causing the depletion of the ozone layer?"
See "What is causing the depletion of the ozone layer?"
See "What is causing the depletion of the ozone layer?"
Contaminants that ozone will attack, instead of absorbing UV-B.See "What is causing the depletion of the ozone layer?" in the "Related questions" section below.
The substances that are causing ozone layer depletion are freons, CFC's etc.. These are called as ozone-depleting substances (ODS).
See "What is causing the depletion of the ozone layer?"