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Nuclear, and backup-baseline geothermal; Iceland has a lot of low cost energy and other hotspots could be similarly tapped. There are a few places where even just long burning coal seam fires could be used to generate power if you worked out the engineering to run heat tolerant piping into the...

The new design uses less energy because the fuel pellets come with a copper and/or gold sheathing, which decease the energy needed to contain the fuel as it achieves fusion, even if the difference is just a few milliseconds. The metal carries it's own magnetic field, where as a raw fuel pellet...

So in discussions elsewhere, the trick of this design has come out, and it's...neat, but has problems of it's own. They encased the fuel pellets in gold foil, which created a small magfield as the device powered up, and held the fuel together tighter, longer, and so the machine used less power...

Eh, it's more that powersats/orbital mircowave transmission for wireless energy transfer from orbit also has a..secondary use as orbital weaponry that anyone who isn't blind can inuit, even lay people, and not a lot of people want a a network pf powerstations that double as 'death rays'...