What is the difference between ozone depletion and global warming?
Ozone depletion refers to the thinning and loss of ozone whereas global warming refers to the widespread warming of average temperatures across the globe.
The ozone layer allows some energy in and some energy out. The ozone protects us from UV-B rays, which can be very harmful (these are the rays that cause skin cancer). With less ozone, more UV-B rays reach earth's surface, harming humans and other animals as well as plants.
The hole in the ozone layer does not presently allow enough UV-B radiation to reach earth to contribute to global warming. However, both global warming and ozone depletion are anthropogenic in nature (caused by humans).