Question

which chemical damages the protective ozone layer? a. nitrogen b. carbon dioxide c. greenhouse gases d. chlorofluorocarbons

Explanation:

Chlorofluorocarbons (CFCs) are known to damage the ozone layer. When CFCs reach the stratosphere, they break down due to ultraviolet radiation, releasing chlorine atoms. These chlorine atoms react with ozone ($O_3$) molecules, converting them into oxygen ($O_2$) molecules, thus depleting the ozone layer. Nitrogen is a major component of the atmosphere and does not damage the ozone layer. Carbon dioxide is a greenhouse gas but its main impact is on global warming, not ozone depletion. Greenhouse gases in general are related to climate - change (global warming) rather than ozone - layer damage.

Answer:

D. Chlorofluorocarbons