But energy, or electricity, is already in the air, around us, all around. Even think of Tesla when he was inspired to build the AC motor/generator thing.

This area isn't my hobby but even when you basically look at spinning magnets around a conductive material, is it just the magnet, and the magnetic field of the magnet, and the conductive metal, like in Tesla's invention all there is to it? I get the impression that when the magnet is spinning and doing its thing the 'air' or what's in it plays a part... ;)