I’ve just finished reading The Big Necessity: The Unmentionable World of Human Waste and Why It Matters, and it’s no exaggeration to say that it’s among the best books I’ve ever read. I’ll have more to say later, but for now just one sentence from the closing chapter (emphasis mine):
Water, water everywhere and none of it is infinite. Water is a fixed commodity. At any time in history, the planet contains about 332 million cubic miles of it. Most is salty. Only 2 percent is fresh water and two-thirds of that is unavailable for human use, locked in snow, ice and permafrost. We are using the same water that the dinosaurs drank, and the same water has to make ice creams in Pasadena and the morning frost in Paris. It is limited and it is being wasted.