Question: is it possible to have any of the following - 1. Steam engine in a car 2. A steam internal combustion engine 3. A hydrogen internal combustion engine Background info Hi all, I am working on a fiction short story for fun. It is set in a parallel universe so history and a few other things are different. It's a mix of steampunk and present day settings and technology It doesn't have to be extremely accurate. I'm looking more at if these things are possible at all. I appreciate any help you could provide, should you have the time. Thank you.