Marijuana, hash and hash oil all come from the Cannabis sativia plant.
The chemical in cannabis that causes you to feel high is called THC.
How you react to marijuana, hash and hash oil depends on how much THC there is in the drug.
Marijuana smoke has many of the same chemicals as tobacco smoke. These chemicals include carbon monoxide and benzopyrenes.
Marijuana smoke is not filtered and you hold it deeper in your lungs than you do with tobacco smoke. This increases your lungs exposure to cancerous chemicals.