The following submission statement was provided by /u/FDuquesne:

It's a new hydrogen-diesel hybrid engine affectionately known as "baby number two" that could help to decarbonise some of Australia's heaviest industries.

Engineers at the University of New South Wales (UNSW) say they have successfully modified a conventional diesel engine to use a mix of hydrogen and a small amount of diesel, claiming their patented technology has cut carbon dioxide (CO2) emissions by more than 85%.

Please reply to OP's comment here: https://old.reddit.com/r/Futurology/comments/10gquk6/the_race_to_make_diesel_engines_run_on_hydrogen/j548yd8/