Electricity from "thin air"
Not exactly John Galt's invention, but if it works it may accomplish the same purpose.
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Is this the generator invented by John Galt in AS, producing electricity from static?
Just imagine the electricity that could be generated during a Micro Nova when much of the surface water is evaporated on the side of the earth facing the sun.
Good time to charge up your Tesla batteries before things get cold and dark for a long time.
What, something productive from the swamp?