CFCs
Lack of attention (maintenance) causes break downs.
CFC's are the gases that react with ozone to break it down. They deplete the ozone.
Amylase
See "What is causing the depletion of the ozone layer?"
sedimentary rocks
Ozone depletion is the process where ozone holes are created in the ozone layer. It is caused due to the action of chloro-floro-carbons on the ozone molecule to break it down to oxygen.
CFCs break down ozone in the atmosphere when they are exposed to ultraviolet radiation. This causes the CFC molecules to release chlorine atoms, which then react with ozone molecules, leading to the destruction of the ozone layer.
ozone layer is affected by the man made and natural causes. Somewhere down the line, it also causes global warming.
See "What is causing the depletion of the Ozone Layer?"in the "Related questions" section below.
Ozone layer break because of CFC's. they react with ozone and break it.
Break down in aveolia walls