Water 4.0

The history behind our growing water crisis: “A gem . . . An erudite romp through two millennia of water and sanitation practice and technology.” —Nature

Turn on the faucet, and water pours out. Pull out the drain plug, and the dirty water disappears. Most of us give little thought to the hidden systems that bring us water and take it away when we’re done with it. But these underappreciated marvels...