hydrogen fuel cell delivery van to FedEx. Workhorse built the class 5 E-GEN delivery van, which is charged by a ProGen hydrogen engine made by Latham, N.Y.-based fuel cell manufacturer Plug Power .

Fedex has been on the leading edge of testing and deploying various alternative fuel delivery trucks for several years and has now expanded its fleet of hybrid delivery vans by 50 percent.

A year later, FedEx started experimenting with autonomous truck delivery in 2021 ... successfully lower the internal temperature in its van up to 15 degrees Fahrenheit. So, how does it do this ...