You are presented with the question "What can help decrease emissions?" and the following answer choices: 
- power
 - exercise
 - Carpooling
 - Flying on airplanes
 - Having children
 - Eating red meat
 - green manures
 - electricity

Now knowing that carpooling decreases the amount of cars used to travel to a place and cars and gasoline-burning engines are large sources of emissions, choose the best answer.


 

   Carpooling      