Sharing a ride with a coworker takes one car, and its carbon dioxide emissions, off the road. Every gallon of gas that commute buddy doesn’t burn by driving themselves saves about 20 pounds of CO2.Trusted Source Added bonus: The more people who jump on the carpooling bandwagon, the less miserable rush hour might eventually become. Call in a coworker or use an app like Carma to partner up and save the environment together.