There's cleanliness to how I eat now. I'm much more in tune with my body, so now that I'm so in tune based on having become a semivegan, I can tell what foods affect energy levels. I can tell when I've been eating particularly high nutrient foods or I can tell when my glycemic levels are all over the place.
So if somebody wants to build a coal-powered plant, they can; it's just that it will bankrupt them because they're going to be charged a huge sum for all that greenhouse gas that's being emitted.
Some authors have conceptualized depression as a "depletion syndrome" because of the prominence of fatigability; they postulate that the patient exhausts his available energy during the period prior to the onset of the depression and that the depressed state represents a kind of hibernation, during which the patient gradually builds up a new story of energy.