> [...] which notes that the pursuit of efficiency suffers from diminishing returns, whereas abundent energy does not. But it does? For example, if we put more

> [...] which notes that the pursuit of efficiency suffers from diminishing returns, whereas abundent energy does not. But it does? For example, if we put more and more energy into making trains move fast, the returns will diminish. It's simply not worth it, considering cost and energy net stability. I did not read the book you are referring to, so maybe the context is different in the book. Somewhere that energy must come from and at some point it is going to hit us, when we use too much energy for things. In the short or the long run.