People are seriously discussing the relative merits of H20 vis a vis marijuana, and they're not doing it right.
Want to compare the two?
Have one group smoke a joint, measure the effects, have the other group inhale the water.
Then have a group drink the water and another group ingest the marijuana, measure the results.
I suspect the people inhaling the water will show the worst impacts.
Ultimately, the whole argument is pointless.
People can't live without water, and they can't drink Lake Huron.
People do just fine totally abstaining from marijuana.
None of that is important.
What is important is the following question:
What right does anyone have regulating the substances an adult is willing to place in his body?
Medical effects be damned, the hophead has as much right to destroy his one and only body with heroin as the pothead has to damage his body with marijuana as the sanctimonious regulating tee-totaller has sticking his head up his ass.