What causes air pollution?

John wants to use his car to go to a nearby shop. Rina suggests that he take a bicycle instead of the car. Why do you think Rina says so? (Hint: What does a car give out into the air?)

Look at the picture given below and identify if it leads to pollution. 

Look at the picture given below and put the cross mark if it leads to pollution.

Look at the picture given below and identify if it leads to pollution. 

Look at the picture given below and put a cross if it leads to pollution.