you would smell it it has kind of a grape/ flowery fruity smell if you smelled it you would know
Yes.
Yes!! They can see the cells on the eyes surface.
Yes, you can. However, in most cases they can tell the difference between first hand and second hand smoking.
Depends if they just smoked weed probily yes, but if it was the previous day, then probily not.
all of them :)
everybody
a lot
no as he smoked weed
Yes
50000000000000pds
No.
If your friend smoked weed, and sniffed glue, he will not be alright because he already has the drugs in his system.