This segment is from Tuesday's edition of "Digging for Value," in which sector analysts Joel South and Taylor Muckerman discuss energy and materials news with host Alison Southwick. The twice-weekly show can be viewed on Tuesdays and Thursdays. It can also be found on Twitter, along with our extended coverage of the energy and materials sectors @TMFEnergy .

Clean Energy Fuels (NASDAQ:CLNE) and GE Capital agreed this week to finance future natural gas truck purchases, giving an excellent option for smaller trucking companies to substitute diesel trucks with cleaner-burning natural-gas-powered fleets.

It is obvious this agreement helps Clean Energy Fuels, as the trucks will sign agreements to use the companies refueling stations throughout North America, but other winners are Westport Innovations (NASDAQ:WPRT) and Cummins (NYSE:CMI), as both are innovators in natural gas powered engines. 

Joel South has no position in any stocks mentioned. Taylor Muckerman has no position in any stocks mentioned. The Motley Fool recommends Clean Energy Fuels, Cummins, United Parcel Service, and Westport Innovations. The Motley Fool owns shares of Cummins and Westport Innovations. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.