More pothead propaganda. Of course they aren't studies or statistics correlating marijuana to death and cancer like there is for alcohol. Alcoholism is a disease, and yes it's worse for you. When someone dies from an alcohol related disease it's easy to correlate the source.
Here is my rant to those who think smoking weed is healthy, because "no one died from it".
When someone dies of lung cancer who's been smoking weed for 10 years, no doctor correlates the source. Inhaling marijuana in-general deteriorates your health in many aspects, but no doctor is going to say his official death was from smoking weed. When someone inhales carbon dioxide for 10 years and dies of a heart attack, again, no one correlates it to weed although it could have been the primary cause.
Don't let these "statistics" cloud your judgment. Don't let hearsay cloud your judgment either, I had a grandparent who smoked cigarettes and drank everyday of his life and lived to be 81. That doesn't mean you will.
Here are the FACTS about marijuana. Not opinions of whether they are bad or good for you, just factual data of what it contains and it's basic effect.
Increased heart rate, lowered blood pressure. Smoke a bowl then check your pulse and blood pressure.
Marijuana SMOKE contains 3 times as much tar as a cigarette. Yeah, that thick black sticky resin that accumulates in your bowl didn't fall from the sky.
Marijuana smoke contains carbon dioxide.
Those are the FACTS, I'm not going to go into studies, or hearsay. Nothing will kill you in moderation, but if you smoke all day, everyday and think it's "healthy" you're in for a wake up call.
In 10-15 years you'll wake up an anti-social, delusional, paranoid, out-of-shape parasite who can't run a block without gasping for air.

Oh yeah, I still see buddies of mine that never quit smoking weed after high school. They're losers. Every single one of them. There is a little propaganda for you.