Is passive smoking more harmful than active smoking?

Yes passive smoking involves those in your surrounding to inhale certain toxic gases which in turn could harm more than "natural smoking" Smoking the cigarette you are getting the filtered smoke, but secondhand smoke you are getting the "sidestream" and "mainstream" smoke. this means you are breathing in what the smoker is exhaling out, and what is burning off the cigarette. 40% of lung cancer patients who have died are second hand smokers. Done ;)