Wal-Mart checks hybrid trucks off shopping list

BENTONVILLE, Ark. -- Wal-Mart Stores, Inc. is set to test two new types of heavy-duty commercial hybrid trucks and two different alternatively fueled heavy-duty trucks as part of the company's efforts to having a more sustainable trucking fleet.

Westport makes environmental inroads with Wal-Mart

VANCOUVER -- Westport Innovations has partnered with Wal-Mart to introduce four liquefied natural gas (LNG) fuelled Peterbilt 386 trucks into service for the department store's fleet.