As a step to reduce emissions, Columbus, Ohio, has introduced CNG vehicles

As a step to reduce emissions, Columbus, Ohio, has introduced CNG vehicles to their fleet, along with other “green” vehicles. By the end of 2013, the city is
projected to have approximately 64 CNG vehicles in use, which will displace more than 229,000 gallons of diesel and save more than $444,000 in fuel costs.
(Photo provided)