CFC does not kill people. That is the reason for its use in the first place. It is a wonderful inert substance. The only problem is CFC kills Ozone and that will remove the UV shield that ozone provides and then people and most all other living things will die from radiation exposure. My boss, an avid mountain climber contracted skin cancer after climbing in Alaska while the ozone hole was at maximum. Irony is that he was the manager of our spray paint division which itself was using CFC as propellant. A month after this incident the company switched to air pressure for its spray paints.