Name two gases which are considered to be better than $CFCs$ and cause less damage to the ozone layer.

(N/A) The two gases considered to be better alternatives to $CFCs$ (Chlorofluorocarbons) due to their lower ozone depletion potential are:
$(i)$ Hydrofluorocarbons $(HFCs)$: These compounds contain hydrogen,fluorine,and carbon. They do not contain chlorine,which is the primary element responsible for ozone destruction in $CFCs$.
$(ii)$ Perfluorocarbons $(PFCs)$: These are compounds consisting only of carbon and fluorine atoms. They are chemically inert and have a significantly lower impact on the ozone layer compared to $CFCs$.