Question

which air pollutant is most likely to cause bronchitis?
carbon monoxide
pollution
emissions
ozone

Explanation:

Carbon monoxide is a toxic gas that affects the blood's ability to carry oxygen. Pollution and emissions are broad terms rather than specific pollutants. Ozone, when present in the lower atmosphere (troposphere), is a harmful air pollutant. Ozone can irritate the respiratory system, leading to conditions like bronchitis.

Answer:

ozone