Environmentalists are not wedded to a low-energy ideal, they&#x27;re wedded to a non-polluting one. Speaking for myself, I&#x27;d be happy with, say, a P-B aneutronic fusion system and would vastly prefer this over solar or wind. But we don&#x27;t have this right now, and solar or wind are the least polluting alternatives, and considerably cheaper to develop than nuclear options.