Question

samanthas urban community is blanketed with smog. which statement best explains the reason for this poor air quality?
people crowd sidewalks as they walk to shopping malls.
people use underground subways for long - distance travel.
people ride bicycles to commute to work on a daily basis.
people drive cars whenever they need to go somewhere.

Explanation:

Cars emit pollutants like carbon monoxide, nitrogen oxides, and particulate matter. When people drive cars frequently, these emissions accumulate in the air, contributing to smog. Walking (people crowding sidewalks), using subways (underground subways for long - distance travel), and riding bicycles (riding bicycles to commute) do not produce significant air - polluting emissions in the same way as cars.

Answer:

People drive cars whenever they need to go somewhere.