Quote Originally Posted by Revanche21
the water IS the visual aid to see how much bullcrap is in the smoke its the first of defense in filtration

water catches all the ashes and spent weed thats why it turns black

water DOES NOT filter or eliminate toxins or tars ... Decent digitally controlled vaporizers do

The vaporizer produced THC at a temperature of 185° C. (365° F.) and completely eliminated three measured toxins - benzene, a known carcinogen, plus toluene and naphthalene
These toxins are known to be in MJ smoke

Carbon monoxide and smoke tars were both qualitatively reduced by the vaporizer, but additional testing is needed to quantify the extent of the decrease.
NORML -MAPS Study Shows Vaporizers Reduce Toxins in Marijuana Smoke
Medical marijuana patients may protect themselves from harmful toxins in marijuana smoke by inhaling their medicine using an electric vaporizer, according to results of a study by California NORML and MAPS (Multidisciplinary Association for Psychedelic Studies).
The study showed that it is possible to vaporize medically active THC by heating marijuana to a temperature short of the point of combustion, thereby eliminating or substantially reducing harmful smoke toxins that are normally present in marijuana smoke. Vaporizers may therefore substantially reduce what is widely regarded as the leading health hazard of marijuana, namely respiratory harm due to smoking