Question

Carbon monoxide, a substance found in tobacco smoke, is also found in

Answer 1

Answer: Cars, gas and wood stoves, and heaters

Explanation: Carbon monoxide (CO) is a colorless and odorless poisonous gas. Besides smoke from tobacco, known CO-exposure sources include exhaust fumes from cars, gas and wood stoves, and heaters.

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Answer 2

Answer: it is present in indoor and outdoor air in various amounts from vehicle exhaust, gas stoves, wood burning stoves, furnaces and cigarette smokes.