Question

the substance which is chiefly responsible for the development of Ozone layer is​

Answer 1

Answer:

Chlorofluorocarbons Chlorofluorocarbons (CFCs)

Answer 2

Answer: Chlorofluorocarbons (CFCs).

Explanation:

instead of develpoment , the question should be depletion of Ozone layer

And the substance which is chiefly responsible for the depletion of Ozone layer is​ Chlorofluorocarbons (CFCs).