UPS and Wal-Mart are driving big changes with natural gas truck fleets.
There are many countries across the globe that utilize natural gas as transportation fuel. Argentina and Iran are among the world leaders. It is a trend that hasn't really picked up in the U.S. -- until now.
Natural gas is too cheap and too useful to ignore, and it is making inroads in the world of long-distance trucking. In this video, Fool.com contributor Aimee Duffy talks about the efforts of UPS (UPS 0.53%) and Wal-Mart (WMT 0.57%) to take advantage of this growing movement.
Fool contributor Aimee Duffy has no position in any stocks mentioned. If you have the energy, follow her on Twitter, where she goes by @TMFDuffy.
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