What we really need is new sources of *portable* energy. It's hard to
beat gasoline where a single bucket, (10 L), contains ~90 KWh.
Portable energy is the kind that fuels our cars, trucks, aircraft, most
boats and many trains.
Storing energy, from whatever source, requires many times the volume
and/or weight of fossil fuels, and can't be carried in a "bucket".
Ethanol may be an exception, having about two thirds the energy content
of gasoline, but as many have pointed out here, it has its own problems.
So far, political correctness doesn't seem to be one of them!
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