Big business has quickly become the driving force behind alternative fuel transportation. Many companies are jumping at the chance to switch their fleet vehicles away from running on diesel fuel that is dirtier -- and more expensive -- than natural gas. In this video, contributor Aimee Duffy points out one telecommunications company that is a surprise leader in fleet conversion, and highlights the efforts of a few other companies.

Motley Fool contributor Aimee Duffy has no position in any stocks mentioned. Motley Fool contributor Tyler Crowe has no position in any stocks mentioned. For more energy information, follow them on Twitter, @TMFDuffy and @TylerCroweFool.

The Motley Fool recommends Clean Energy Fuels and United Parcel Service. 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.