And chemo is a lot more. IMO if you are going to smoke weed you may as well cut the damage it does as much as possible, and 400-ish is a small investment to do that.
Yea, most use a Bong or Houka filled with water thinking this protects them. But, most aerosol-ized impurities and suspended particulate from burning raw cannabis are not water soluble. It's better to fill it with diluted alcohol as that is more effective, the impurities tend to be more readily alcohol soluble. If you're feeling handy combine that with an activated carbon filter and you're going to get most of the really bad stuff. By the way, Marijuana has no more carcinogenic material than any other plant if you smoked it, you could smoke a dandelion and have the same issues to deal with. The psychoactive ingredient THC itself is not a carcinogen, it's all the other crap that all plants have that when burned aerosol-ize and are absorbed by the lungs.
A lot of people don't know this but there is a manufactured form of pure THC. It is available in capsule, liquid or pill form and is swallowed. It is only available for pure research sanctioned by the Federal Government, based on Marijuana's place as a Schedule I Narcotic. But, if it ever became legal there will be the smokeless option as well, although it is expensive to reduce to it's pure form and digestive enzymes breakdown and render inert a good portion of the psychoactive THC when ingested.
