Question: There are smokers, nonsmokers, marijuana smokers, non-marijuana smokers and really 2nd hand smokers exposed to the smoke. Research the effects of cigarrette/cigar/marijana smoke or 2nd hand smoke and generate a thread discussing your findings. Be sure to include your reference(s). Discuss the respiratory system anatomy/function as it relates to the effects of smoking, 2nd hand smoke exposure, etc Explain your answer and provide examples.