2.  CFCs are Halogenoalkanes  They contain only Chlorine, fluorine and carbon!  All the hydrogen's have been replaced.

3.  Very stable due to the CARBON- HALOGEN bonds

4.  VERY stable  Volatile  Non-flammable  Non-toxic  Used in fridges, aerosols, air con and dry cleaning.

5.  HCFCs or Hydrochloroflurocarbons  HFCs or Hydrofluorocarbons  These are used as temporary alternatives to CFCs until safer products are found  HCFC still breaks down OZONE but in smaller amounts. They are broken down after 10-20 years.  HFCs are broken down in the atmosphere but don’t contain chlorine so don’t effect the OZONE.

6.  Is in a layer of the atmosphere called the Stratosphere  It contains most of the O 3 molecules.  Ozone is formed when UV sunlight hits the oxygen molecules.

7.  If the correct amount of UV light hits a oxygen molecule, it splits into free radicals. The free radicals combine with other oxygen to form OZONE.  CFCs absorb UV radiation and spilt to form chlorine free radicals. These free radicals then destroy OZONE, then regenerate and destroy even more!

8.  1 Chorine Atom can destroy 10000 ozone molecules before becoming stable!  Nitrogen oxides free radicals can also destory the ozone. This is produced from planes and car fumes. It effects the ozone in the same way as CFCs.  These are not the only ones!

9.  If the correct amount of UV light hits a oxygen molecule, it splits into free radicals. The free radicals combine with other oxygen to form OZONE.  CFCs absorb UV radiation and spilt to form chlorine free radicals. These free radicals then destroy OZONE, then regenerate and destroy even more!