The amount of ozone in a space is a balance of net producers of ozone, net reducers of ozone, and time (ozone decays on its own...).
So the ozone layer changes with temperature, time and season. For example, the ozone hole is an annual phenomenon at each pole. Only the size and duration of the hole may be due to Man's actions.
CFC's are causing damage to ozone layer. They react with ozone to deplete it.
CFC's are causing loss of ozone layer. They react with ozone to deplete it.
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?"
The main factors affecting the ozone layer are the release of ozone-depleting substances like chlorofluorocarbons (CFCs) and halons into the atmosphere. These substances break down ozone molecules, causing thinning of the ozone layer. Other factors such as climate change and pollution can also impact the ozone layer indirectly.
See "What is causing the depletion of the ozone layer?"
CFC's are causing its thinning. They react with ozone to deplete it.
CFC's cause ozone destruction. They react with ozone to deplete it.
The ozone present in the stratospheric region of atmosphere filters our cancer causing rays from the sun. This ozone is present in the form of ozone layer.
See "What is causing the depletion of the ozone layer?"
Yes, scientists know what is causing the ozone layer to disappear. It is the continues use of ozone depleting substances.