Still not a natural energy source, fusion as envisioned requires D+T fusion, not extracted from hydrogen gas but from seawater and lithium irradiation. Hydrogen gas is not naturally occurring on Earth, so by definition it cannot be a "natural" energy source. It's an intermediate product.
> Still not a natural energy source, fusion as envisioned requires D+T fusion, not extracted from hydrogen gas but from seawater and lithium irradiation.
You can fuse hydrogen, too. It's 'just' harder.
> Hydrogen gas is not naturally occurring on Earth, so by definition it cannot be a "natural" energy source. It's an intermediate product.
Not quite sure anything would count as 'natural' in that sense. Almost everything is processed in some way. I thought the problem was with 'energy source', not with 'natural'.
Yes, unless you count fusion. But that's a completely different context.