Australian company Aviation H2 hopes to clean up commercial flight by converting existing aircraft to burn green ammonia instead of standard Jet-A jet fuel. To do so, it's planning to have a nine-seat passenger jet in the air and flying on ammonia by the middle of next year.

Ammonia, as we've discussed at length, is a promising energy carrier and future fuel with interesting potential for decarbonizing sectors like shipping and rail. The second-most produced chemical in the world today, it's primarily used as a fertilizer, but as the clean energy revolution kicks in, it'll start to be used effectively as an easier way to move and store green hydrogen.