Comment by JumpCrisscross

> Energy from nuclear fusion is available today – you just need solar panels to capture it

Nitpick: stellar fusion is fundamentally different from thermonuclear fusion.

Proton-proton fusion is mediated by the weak force [1][2]. A lump of the Sun radiates less power than your body. It works because there is a lot of Sun. Thermonuclear fusion is far more energetic because it's mediated by the strong force.

[1] https://en.wikipedia.org/wiki/Proton–proton_chain

[2] https://en.wikipedia.org/wiki/Beta_plus_decay