It's all implied. Maybe he doesn't know about some of those things, but it is incredibly common to talk about it in those terms without spelling out that you m

It's all implied. Maybe he doesn't know about some of those things, but it is incredibly common to talk about it in those terms without spelling out that you mean excess / problem-causing amounts of the effect, etc. When he says can't have things he's talking about human energy use. He says right after you need to use wind, solar, etc.