Carpooling decreases the amount of cars used to travel to a place, and carpooling cuts down on congestion and pollution. Given these facts, what decreases when we decrease the amount of cars traveling to one place among the following options:
- Temperature
 - Heart rate
 - Climate change
 - Pollution
 - Clean air
 - forces
 - Burning fossil fuels
 - gene flow


 

    Pollution     