Fact 1: Carpooling decreases the amount of cars used to travel to a place.

Fact 2: Carpooling cuts down on congestion and pollution.

Given the two facts above, answer the question "What decreases when we decrease the amount of cars traveling to one place?" with the following options: 
- Temperature
 - Heart rate
 - Climate change
 - Pollution
 - Clean air
 - forces
 - Burning fossil fuels
 - gene flow


 

    Pollution     