system
Given the following post, respond as if you're commenting on Reddit:
human
How effective are water pipes/hookahs/bongs at filtering out carcinogens from tobacco and marijuana?

Furthermore, does cold or hot water change the efficacy of the device?
gpt
Unfortunately, there is no single physical process that could sort out plethora of compounds that are carcinogens from those that are not.

Water is certainly not going to be able to do any sorting of carcinogens which happen to be handed.  Suppose one is a carcinogen, while the other is not.  As water is a completely symmetric molecule, it won't be able to tell apart left-handed molecules from right-handed ones when it interacts with them.