UPS has announced that it will supply its fleet in Memphis, Tennessee, and Jackson, Mississippi, with an estimated 15 million diesel gallon gas equivalents of renewable natural gas, or RNG, as part of a multi-year agreement with Memphis Light, Gas and Water and Atmos Energy Marketing, LLC. The deal is part of an initiative announced earlier this year by UPS to significantly expand its use of renewable natural gas in UPS's alternative fuel and advanced technology fleet.