You are presented with the question "How can smog be reduced?" and the following answer choices: 
- Burning fuel
 - Flying airplanes
 - air cools
 - evaporation
 - exercise
 - vaporization
 - Driving more cars
 - Carpooling

Now knowing that carpooling decreases the amount of cars used to travel to a place and ozone from cars creates smog, choose the best answer.


 

        Carpooling 