What is the main cause of ozone depletion?

Answer 1

The main reason for ozone depletion are the chlorofluorocarbons (CFCs) found in everyday products such as refrigerator coolant, fire extinguishers, and in aerosol cans. These were released into the atmosphere during the second half of the twentieth century and their effects are still being felt. Chlorine is released from the CFCs which destroys the ozone.
The major cause of ozone deletion is the pollution of the environment. This is mainly done when halons are released into the atmosphere.

Answer 2

The main cause of ozone depletion is the release of certain man-made chemicals called chlorofluorocarbons (CFCs) and halons, which break down ozone molecules in the stratosphere. These chemicals are often found in refrigerants, aerosol sprays, and industrial processes.

Answer 3

A lack of sunlight hitting the upper atmosphere during the winter months at each pole. This is why the thinning areas only appear during the end of the winter months at each pole.