Halons, used as fire extinguishing chemicals, also destroy ozone. See the following animated model to understand how ozone is destroyed by CFCs . A damaged ozone layer means that more of the sun's harmful UV radiation is able to reach the earth's surface. This radiation can cause sunburn, skin cancer and eye diseases. Go to the following link for more information about UV radiation .
Ozone depletion occurs over much of the planet.
These reactions happen on ice crystals in the very cold, high-altitude clouds above Antarctica. Resources and actions Students will need access to the internet to view the ozone animation showing - How ozone is destroyed by CFCs. Print off the student's worksheet and photocopy one for each student. Ask the students to carry out the activity from the worksheet. Solutions Students to draw graph.