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Interesting , didn't realise that water was considered a greenhouse gas
I think that whilst humans are on the planet we will make a mess of it in some way or another ,. You could argue it's a natural thing. Even animals can make a mess of their environment in their own way. No one talks about population growth and restricting that which you could argue is a big issue
Anyway I digress , not sure what the answer is. If hydrogen could be produced cleanly ( solar powered?) it may be doable but as you say nothing is perfect. Lithium batteries are hardly green when you factor everything in.
From a usuability point of view refilling times of hydrogen being the same as petrol make sense and the whole point of the car is convenience and having to wait an hour at a charging point is certainly not that ( assuming it's free of course)
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