What is meant by ozone layer?

 Ozone layer means a layer of ozone gas present in atmosphere.

You know that atmosphere have 3 layer 

In stratosphere the ozone layer is present.

Generally from land to 40km up the ozone layer startes.

Why ozone layer is important?

Because of ozone layer protect earth from the sun ultraviolet rays due to ultraviolet rays aur global warming is increasing and a lot of skin disease and skin cancer is results of destroys of ozone layer.

CFC gas

CFC gas mean chloroflurocarbon that is gas present in our daily equipment like fridge, refrigerator, body spray etc

This gas have 50 to 100 years life. If this gas realise and go to automospher it can damage ozone gas.

So please use CFC free aqupiment in home

Plant lot of tree

Do not burn plastic bags.

Thank you.