What Are The Main Dangers Of Aerosol Sprays?

While the danger of the can's exploding if heated has been long recognized (most aerosols have a warning on the can), recent criticism points at the vapour (mist) and the chemical content. The fastest way to absorb a chemical into the body (aside from injecting it directly into a vein) is to inhale it. The propellant or gas in most aerosols is a fluorocarbon, and some authorities think that inhaling it is dangerous, especially for people with allergies and lung or heart disease. In the United States, one propellant (vinyl chloride gas) has been linked with a rare form of liver cancer and so over 100 aerosol products containing it have been banned or voluntarily withdrawn from sale.

It is also claimed that the propellants can burn or inflame exposed areas when, for example, a deodorant spray is applied too close to the skin. In some cases spray in the eyes can result in permanent scarring.

In addition to possible health hazards, critics also point out that the aerosol packaging is over twice as expensive as the same product in a simple container. The buyer must pay for the strong can, the spraying devices and the propellant.

Fumes from aerosol sprays - hazards.
I live in an apartment complex and I share the 2-car garage space with another tenant.  It is an enclosed double car garage, with a door that closes. There have been times when the concentration of some kind of noxious fumes has made it difficult for me to breath as I got in to my car before I  pulled in to the garage. I always had those fumes in my lungs after I left the garage. I HAD to breath as I got out of my car to leave the garage. The fumes were awful! Mind you, he has told me "NO" he did not use ANY kind of chemical in the garage.
Of course, he was lying! After months of this awful fume condition being created in the garage -- off and on, mind you --  I happened to look out of my back window, last week, when I heard the garage door open. Then, I  then saw him spraying the axle of his bike before he headed out for his all-day cycling. THIS time, he was standing outside of the garage as he sprayed. He put the can back into the garage, closed the garage door, and left. So -- after he left for his day out on his bicycle, I went down and looked/smelled that can. YES! That was IT! The product is:  Tri-Flow, Superior Lubricant with Teflon. I also photographed the aerosol can -- front and back.
Yes, I have reported him to the landlord, but that has made no difference until I put up a note about fumes --  including the information that I had been to the local City Hall to report him -- which is true.  Unfortunately, in the past year, this has happened about 6 or 7 times. And I have had to breath those poison fumes as I got out of my car to close the garage door. I could never figure out what was causing the fumes -- until now.