How many carcinogens are in a marijuana cigarette?

There can be upto 16 different toxins in cigarette tobacco and nicotine is the most poisonous substance known to man. I don't know how many there are in marijuana but if using tobacco to skin up then you are drawing in the most poisonous toxins in the world. If you cut up 3used filters and drowned them in water and drank it you would die. That's what pow's used to do to commit suicide so they couldn't give away any info of their side