Port cranes line up at the Evergreen Cargo Terminal at the Port of LA. The company was the first to begin switching from on-board diesel-powered generators to power its electric motors to cranes using electricity directly from the grid.  The Port of LA is the largest of the nation's 360 seaports and ranked as the busiest.  Diesel has traditionally powered all port equipment as well as the hundreds of large trucks at the port to picking up or returning a container.  Managed and operated by the Los Angeles Board of Harbor Commissioners,  the Port of LA is moving toward electrification of all equipment — with fuel cells running on hydrogen to batteries to direct grid connection — in order to reduce carbon dioxide and other more noxious emissions. | Shutterstock