[api]

Fusion is reasonably easy. You can do it in your garage with an electrostatic confinement fusor. I’m talking about fusion that generates significantly more power than it takes to run the reactor. Only that kind is useful as an energy source. That so far has been elusive.

Inertial confinement has sort of achieved this but only on paper. If you tally up the total input to set up and run the system it’s still way in the red.

ITER has the potential to run just a bit over unity but it’s really just a research platform.