Michael is studying the air quality of various cities. He finds that there are many more pollutants in the air in Mexico City, than there are in the air of Chicago. Therefore, the air quality will be higher in
Chicago Mexico City
A B
More pollutants mean poorer air quality.
air quality
more
poorer
MORE
LESS
pollutants
Less
More
Air
Pollution
Pollutants
Pollutants