Can you always see air pollution?
Why?

(a)  

What is the special word for smokey air pollution trapped in fog?

(a)  

A blown up balloon is about the same size as what part of your body?

(a)  

How do electric cars still produce air pollution?

(a)  

How can air pollution harm people?

(a)  

Air pollution causes _ _ _ _ rain.

(a)