> It’s much more efficient than other materials in many ways. That does not matter if it's poisoning us. And if we end up in a situation where energy is cheap

> It’s much more efficient than other materials in many ways. That does not matter if it's poisoning us. And if we end up in a situation where energy is cheap (thanks to PV or whatever), it might be much better to use less efficient less poisonous materials, like glass or ceramics (and so on).