Zero emissions for heavy-duty transportation are achievable, as demonstrated by Cummins sending one of its hydrogen-fueled trucks on a journey of 1,806 miles.

According to Ford, any F-150 supplied with a turbocharged 3.5-liter EcoBoost V6 powerplant can haul 2,445 pounds in ... making sure you don't turn your heavy truck into a runaway train.

Disquiet over the emissions regulations for heavy trucks boiled over into something like an outright revolt this past year. Here’s a look back at what happened.