Yes, some people do get sick from the effects of smoking and/or the marijuana.
By smoking it...
Marijuana is very high in smell [hehe, pun] So yes. It will in fact be carried on through smell with you when you were in a room when people were/are smoking it.
Zero. There are no records of death resulting from marijuana smoking.
i started at 12
The people themselves. Unlike drugs like cocaine and heroine, marijuana is not chemically addictive.
Smoking marijuana is awesome
You cannot die from smoking marijuana.
not that many as smoking a cigarette
Some people hallucinate from just smoking marijuana, especially in larger amounts. Normally (but not always), this means that you have some pre-existing problem that marijuana is making worse.
One might argue that smoking marijuana is bad for your lungs, since smoking anything is bad for your lungs. As for marijuana specifically, there is no scientific evidence that using the drug is bad for one's health.
no, smoking marijuana actally can help you get an erection easier most of the time