[jjoonathan]

I'm a fan of using magical heat-producing rocks to boil water and spin turbines, but admittedly that has fallen a bit out of fashion.

[MiroF]

This could be nuclear or coal

[jjoonathan]

There's an argument to be had that burning coal doesn't count as magic while fission does, but in any case, good catch, let me amend that to: magic heat-producing rocks that don't fill the atmosphere with dinosaur squeezings.