Wal-Mart is going to introduce four liquefied natural gas (LNG)-fueled Peterbilt 386 trucks into service at their ... greenhouse gas emissions by 20 percent and NOx emissions between 30 and ...

In another move to reduce their trucks' impact on the environment, they have teamed up with Westport Innovations Inc. to use their LNG fuel system on their Cummins ISX 15 liter engine. A look at ...