If you read that article critically it basically says what i said (leaving aside it's a popular news piece not a scientific article). Only real good evidence is for bronchitis, the rest is a tenuous link probably because whatever carcinogens marijuana has very few people are smoking 3 joints a day. That is a lot of pot smoking, whereas I don't think a pack a day of cigarettes is that uncommon.

Not to mention the logic the pot is stronger therefore it's worse for you today makes no sense. If the psychotropic effects are stronger that means you don't have to smoke as much to get high and hence less chance of the smoke-related diseases like bronchitis and cancer.

I'm not arguing pot smoking is safe but the idea that it's as bad as tobacco seems to be stretching it, by a good bit.

There's no need to refute the notion that "pot is safe" by hyperbolic misinformation.