Question

Which is true of CFCs? They are harmless in the upper atmosphere.They are involved in the formation of ozone.They are found in car exhaust.They are harmless near Earth’s surface.

Answer 1

Chlorofluorocarbons are nonflammable, nontoxic, chemicals that contain atoms of carbon, chlorine, and fluorine. They are used in different products like aerosol sprays.

One important characteristic is that this chemical destroys the ozone layer of the Earth.

Therefore, the answer is the last option.