Well said.
It seems to me that the holy grail right now is efficient energy storage, i.e storing large amounts of electrical energy into small volumes of matter, to rival the energy density of fossil fuels. If we can figure this out (without quickly depleting some other limited resource in the process) we'll have virtually free energy forever.
I'm very excited about the improving viability of home electricity storage using batteries. We still need a technological breakthrough or three, then every home will be able to generate its own electricity, and enough for the family cars as well.
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