Clean hydrogen power will soon be arriving at the Port of Honolulu in Hawaii, in a project that’s expected to help lower emissions and reduce energy consumption.

Early next year, specially designed shipping containers powered by fuel cells and hydrogen will be used to keep refrigerated containers cool while they’re shipped on barges from island to island in Hawaii.

The project is being led by Sandia National Laboratories and funded by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) and the U.S. Department of Transportation’s Maritime Administration (MARAD).

Ports across the U.S. are a major source of water and air pollution that have gone relatively unregulated until recently. Major ports sometimes have emissions that