Cars can be cooled with window glazing, interior ventilation and the use of cardboard sun shades. Older vehicles can also be retrofitted with air conditioning systems that do not use CFCs. Again, be sure that CFCs are not being replaced with HCFCs or HFCs. Before you buy a home air conditioner, consider using ceiling fans, improved ventilation systems, window shades, draperies, and planting shade trees. If you are purchasing a new refrigerator or freezer, look for those that contain no CFCs, HCFCs, HFCs.
Halons are another powerful ozone depleter used in fire extinguishers.
Although it is illegal to sell new halon fire extinguishers, you may have an old one in your home. Check the label. Purchase instead an extinguisher containing dry chemical, foam, water, or carbon dioxide and contact your provincial environment office for disposal. If you think your efforts are too small to make a difference, remember the Montreal Protocol. One country could not have slowed global ozone depletion, but over 120 countries working together are.