Question

practices to be adopted to protect ozone layer

Answer 1

do not burn litter :burning emits really harmful gases.
use public transport
use deodorands which are not in the shape of spray:besides spray deodorands u can use cream or roll on which are more ozone friendly.
dont buy aerosol products with chlorofluorocarbons.

Answer 2

reduce the burning of wood and the usage of combustible substances.
usage of eco friendly matters and also usage of renewable substances
usage of public transport to go to near by places