Pollution is most severe in urban areas when a ____.
A) cold upper-level low moves into a region
B) cold front passes through the area
C) large slow-moving anticyclone moves into an area
D) storm system begins developing to the west

Question

Quizplus · Accepted Answer

A large slow-moving anticyclone (high pressure system) can trap pollutants close to the ground, leading to poor air quality in urban areas. The other options do not necessarily contribute to an increase in pollution levels.

Pollution Is Most Severe in Urban Areas When a ____