"It doesn't rely on rare earths"
It relies on petrochemicals of which there are limited amounts, and certainly the amount you can burn is very limited if you don't want big environmental problems late...
small hydrogen gas engines properly made are quite safe. the flashback arrestor is critical. hydrogen produces 5-7 times as much impulse in the detonation and so the engine has to be designed better for thermal dissipation and higher RPMs but unlike carbon fuels it's output is water.
fuel cells are nice in theory but hydrogen modified gasoline engines are ready to be built right now, and make a lot of sense for small engines.
the problem is the hydrogen. for all the talk about decarbonisation where is the research going with biological hydrogen generation? plenty of known methods already exist. problem is that many of them don't work on massive scale.
fuel cells are nice in theory but hydrogen modified gasoline engines are ready to be built right now, and make a lot of sense for small engines.
the problem is the hydrogen. for all the talk about decarbonisation where is the research going with biological hydrogen generation? plenty of known methods already exist. problem is that many of them don't work on massive scale.
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