Question

how are chlorofluorocarbon harmful to use

Answer 1

because it damage the ozone layer which increase the global warming. that's way chlorofluorocarbons harmful to the environment.

I hope it's helpful

Answer 2

Ans.=

Chlorofluorocarbons CFCs are harmful to the ozone layer because they react with ozone(O3) to liberate O causing depletion of the ozone