Answer:Ozone. When you can see the ozone, that's not a good sign.
Particulate matter. Otherwise known as soot, particulate matter is a mixture...
Carbon monoxide. Carbon monoxide (CO) is an odorless, colorless,...
Nitrogen oxides. A road sign shows the level of nitrogen oxide in the air.
Sulfur dioxide. Part of a group known as sulfur oxides
Step-by-step explanation: