Is there any way, either in theory or practice, to produce a voltage than is _negative_ in potential with respect the Earth's surface?
Pleae note, I am not referring to the relative ground of something like a plus and minus power supply. But rather to extract electrons from the ground.
I am also not looking for "free energy", as I realize energy would need to be expended to achieve this ... in effect, another kind of generator.
Before someone tells me it cannot be done, I would point out that natural lgihting involves just such a reverse flow. It is invisible to the eye but has been photographed with UV sensitive film. I believe the term is "convective current".
Fire away!
Evan Brisco