(November 20, 2019) At freight yards like the Port of Los Angeles, Utility Tractor Rig's are hauling containers back and forth. At that port there is a high concentration of these trucks, overwhelmingly diesel powered, which makes for a high concentration of horrid air pollutants. This hydrogen fuel cell truck is one possible solution to the problem. In this application a fuel cell does not have the disadvantages of their use for passenger cars - the UTR's do not travel far, and can therefore be refueled on site.