Never really looked into the benefits of other so called "clean" fuels but have seen articles on them.
Take Hydrogen, currently it appears that Grey is the predominant type at the moment, however, this uses fossil fuels to produce why bother ?
Blue hydrogen uses renewables, I believe that one process at least produces CO2 that has to be buried, What?
Hydrogen burns at a higher temperature, however, it requires 3 times more (or very high pressures) to give the equivent energy (don't quote me on that, just what I have read). Because the molecules are so small the amount of leakage can be a lot higher by migrating from the pipelines, apparently there is some chemical process when hydrogen gas is released into the air, it reacts with hydroxyl radicals (pairs of hydrogen and oxygen atoms) that form water vapor. That prevents the hydroxyls from doing another job: destroying methane molecules. So if the pipelines carrying the gas are not closely monitored or maintained (as is currently the case) is this still a clean fuel.
Currently electric cars are using lithium cells as a power source, again no expert but have read that this (what I consider a rare element) is mined at the cost to the local environment regarding contaminating the local water. This then is transported thousands of miles (currently by sea using fossill fuels) to be processed, again causing polution, then transported thousands of miles to be used.
Again it does seem to depend on what you read, how can you be sure that the information you read is accurate, I believe that institutions that produce these facts bend it to suit their agenda's.
Me, am i helping to save the environment, I like to think so, I recycle, have a garden that's full of flowers & plants for the local wildlife rather than astro turf & concrete (thanks to my wife), however, I like most use energy, drive a car, enjoy holidays etc. so perhaps I'm just as guilty as most others.
That's my rant over