Environment services provider Waste Management will unveil a total of 31 compressed natural gas stations by the end of 2012.

Thirteen of the said fuel stations have already been unveiled in the first half of the year, with the remaining 17 expected to be in operation or construction by the end of the year.

The Clean N’ Green Fuel stations allow the company to secure better natural gas prices to serve its CNG powered waste collection fleet besides commercial and consumer vehicles.

The company owns and operates one of largest CNG & LNG fleets in North America with 1,700 vehicles in service.

Waste Management vice president of fleet and logistics Eric Woods said, "These facilities will serve our rapidly growing CNG powered collection fleet."

Each of the natural gas fueled collection vehicle reduces diesel usage by 8,000 gallons per annum and besides reduction in greenhouse gas emissions by an average of 22 metric tons.