Fact 1: Carpooling decreases the amount of cars used to travel to a place. Fact 2: Ozone from cars creates smog. Given the two facts above, answer the question "How can smog be reduced?" with the following options: - Burning fuel - Flying airplanes - air cools - evaporation - exercise - vaporization - Driving more cars - Carpooling
A:
Carpooling