Information about the Effects & Risks of Smoking:

Cigarette Filters

Having being introduced in the 1950s, while the filter does work in stopping a fair amount of toxicity from entering a smoker’s system, it surely does not do enough. For example, the amount of tar that enters your system even through the best cigarette filters would still be unhealthy. So while these cellulose acetate filters do trap some smoke related particles and tar while making the smoke easier to inhale, they do not block all the constituents that can cause damage.

> What's in a Cigarette?