This sponge uses electrolysis to extract pure hydrogen, and can be powered by solar or wind energy, producing renewable fuel from renewable electricity.

The only portable green fuel source that could replace diesel or kerosene at scale, pure hydrogen is not abundant in nature, and finding ways to produce it sustainably is the key to expanding its use in industry and transportation.

Vehicles can be equipped with hydrogen fuel cells, which combust the pure hydrogen with oxygen to create an effect similar to when fossil fuels are combusted, except the only emission is hydrogen plus oxygen—water.