 Due to the incomplete combustion process responsible for the creation of sidestream smoke, there may be exposure to higher concentrations of carcinogens than are typically inhaled directly.There are over 250 toxins and carcinogens in cigarette smoke.The risks of developing lung cancer, brain tumors, and acute myeloid leukemia and the incidence of heart disease and benign respiratory diseases increase with the inhalation of sidestream smoke.