Quote Originally Posted by JackdaWack
I totally forget where i found this info but a group researched the most healthiest way to smoke and found out that it was between a joint and a vaporizer. Reason being is that joints if not smoked entirely trap most of the tar in the "roach".

Actually i just found the site: enjoy!
Marijuana Water Pipe and Vaporizer Study
Most of these studies are really old. The one you just quoted is over 13 years old. Sure would be nice to get a hold of some more recent studies on this.