Consider indoor air pollution caused by sidestream smoke (unfiltered smoke from

Question

Consider indoor air pollution caused by sidestream smoke (unfiltered smoke from a smoldering cigarette). Suppose the sidestream smoke from one cigarette in a small apartment will produce an airborne formaldehyde concentration that will average 6x10-4 mg/m3 for one hour. How many cigarettes would need to be smoked in the presence of a nonsmoking roommate to raise the nonsmoker cancer risk by 10-6 just due to the formaldehyde? Assume an inhalation rate of 0.83 m3/hr. At eight cigarettes of exposure per day, how many days would it take to create this risk?

Explanation / Answer

12

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