Why usage of chloroflurocarbons being discouraged? Or Explain ozone layer depletion?

Give the reactions involved for ozone layer depletion.

Use of chlorofluoro carbons is not encouraged because (1)They are harmful to the eyes of people that use this. (2)They damage the refrigerators and air conditioners. (3)They eat away the ozone in the atmosphere. (4)They destroy the oxygen layer.

Which of the following statement/s is /are wrong: (i) Nitric oxide and chlorofluoro carbons are two main ozone depleting agents. (ii) In the stratosphere CFCs undergo photochemical decomposition to produce chlorine free radical which destroy ozone layer. (iii) Ozone hole has mainly been observed in the stratosphere over Antarctica. (iv) Innon polar regions of the stratosphere, chlorine monoxide free radicals combine with NO_(2) and chlorine free radicals combine with methane, as a result the chain reaction causing ozone depletion stops v. Northern hemisphere is free from ozone depletion

Which aerosols deplete ozone?

How do CFCs affect ozone layer?