"Reactors by the thousand". Fissile and fertile materials are sufficiently abundant that we could run a economy much larger than the present one entirely on fission for millions of years, and doing so would have considerably lower average health impacts and costs than what we are actually doing. - The fact that we still burn coal is basically insanity, even disregarding climate change, because of the sheer toxicity of the wastestream from coal plants. Mercury has no halflife.