What is worse for you, tobacco or weed?

Probably tobacco: Both contain tar that can harm the lungs, and poisonous carbon monoxide in the smoke. But tobacco also contains addictive nicotine, which means that tobacco smokers usually inhale far more smoke overall than marijuana users. Tobacco is hard to quit, and causes or worsens many diseases over time. Marijuana can impair social and work functioning, but it isn't life-threatening in the same way.

?: Inhalation with marijuana is more prolonged & deeper than with tobacco. Higher combustion temperatures are reached because it is smoked to a shorter butt. This leads to a carboxyhemoglobin concentration that is five times higher than tobacco. Three times more tar is inhaled.