Humanity can already access more energy than is healthy for our planet. Even if you had a zero-greenhouse-gas source of energy, all that energy is eventually d

Humanity can already access more energy than is healthy for our planet. Even if you had a zero-greenhouse-gas source of energy, all that energy is eventually dissipated as heat, so it would not be safe to use an unlimited quantity of it. I looked at the numbers about 10 years ago and iirc I concluded that waste heat is about 10% the impact of greenhouse gasses, so not insignificant. I don't remember how I got that number though, and I could have easily messed something up.