Carbon Monoxide from smoking cars
Assume that all autos satisfy the 1990 Clean Air Act Amendments and produce no more than 9 g of CO per mile. The CO introduced to the atmosphere by cigarettes is on the average 50 mg/cigarette. If smokers consume 10 cigarettes (~1/2 pack) a day and autos are driven 20,000 miles per year on average, estimate how many smokers generate the same amount of CO as one automobile in a year.