Chloroflourocarbons are man made chemicals that are very stable in the atmosphere. Because of their relative stability, CFCs rise into the stratosphere where they are eventually broken down by ultraviolet (UV) rays from the Sun. This causes them to release free chlorine. The chlorine reacts with oxygen which leads to the chemical process of destroying ozone molecules. 
Carbon dioxide traps infrared wavelength therefore scattering it in the Earth's atmosphere increasing global warming.
Greenhouse gases trap heat causing global warming