Various natural activities also cause ozone depletion. Volcanic eruptions being the highest of them.
There are various factors. UV rays and thunder contribute to it.
Greenhouse gases and pollution
The ozone is a natural cycle. It is because various factors that cause ozone depletion also replenish it.
The ozone depletion refers to the thinning of ozone layer due to a no. of factors which include the man made and the natural ones. The natural depletion does not contribute to the ozone hole as the rate of formation of ozone hole is in equilibrium with the depletion. However due to the use of the harmful chlorofluorocarbons by the human beings the rate of depletion of ozone is increasing considerably thus leaving the rate of formation far behind. This difference in the formation rate and depletion rate leads to ozone hole.
Volcano and Oceans do contribute to ozone depletion. But the extent to which they do is very less.
The various CFC's and the H CFC's are the ones which contribute maximum to the ozone depletion.
There might be various factors for the depletion of ozone. Man made CFC's, greenhouse gases etc all contribute to it.
You can contribute from home towards ozone depletion. You can plant trees and stop use of CFC's.
Natural resources are responsible for ozone depletion. But the amount of depletion by them is very less.
Ozone depletion is caused by the Ozone Depleting Substances(ODS) which are man-made chemicals and stay in the stratosphere causing the rate of depletion of ozone greater than its rate of formation.
The use of CFC contributed to depletion of ozone. It is because they react with ozone to decompose it.
The depletion of ozone in stratosphere is due to the continues usage of CFCs. These cfc contribute to the depletion of ozone molecules.