Breathing

"Chlorofluorocarbons (CFCs) are chemicals that are often used as propellants in spray cans. Most rescue inhalers, including this one, uses CFCs to deliver medication to your lungs. CFCs hurt the environment and damage the ozone layer that protects the earth from the sun's rays."

Apparently the device I have been using to help me breathe is doing its part to create a hole in the ozone, which in turn means poorer air quality and even more difficulty breathing. Interesting how that works.