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On reflection, its easy to bag those that try to produce alternative methods of motive power, all research is good, for the survival of the planet, but efforts are wasted by public pressure aimed at magic solutions.
I think the 1st probelm is the use of cars to start with, ppl will eventually live closer to work, plan trips more and use public transport much more, theyll have too. Commercial pressure is the biggest driver in inovation, it always works.
The initial power scorce is the biggest problem, once a (some) green house gass free solution becomes viable (electric power station), everything will change, be it neuclear, geo thermal (my favourite) or some other BASE load scource, solar and wind will always be fringe, they cant provide 24/7 base power. And carbon sequestration is a joke, Carl Krusinofski explained in 1 min why it just wont happen.
Then the cars, Hydrogen fuel cell IMO just wont work, its just too hard, and way too inefficient, and ethanol creates huge problems in production, already we see countries short of food cause of more arable land being used for fuel over food crops, its a dead end.
What we need is a revolution in battery technology, the electric drive technology is efficient, mature and ready to go. Electric delivery infrastructure is already there, all it needs is friendly generation.
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