"It’s a contraption that makes the lists of “Greatest Inventions Ever”; at the same time, it’s accused of causing global disaster. It has changed everything from architecture to people’s food habits to their voting patterns, to even the way big business washes its windows. It has saved countless lives . . . while causing countless deaths. Most of us are glad it’s there. But we don’t know how, or when, it got there. It’s air conditioning. For thousands of years, humankind attempted to do something about the slow torture of hot weather. Everything was tried: water power, slave power, electric power, ice made from steam engines and cold air made from deadly chemicals, “zephyrifers,” refrigerated beds, ventilation amateurs and professional air-sniffers. It wasn’t until 1902 when an engineer barely out of college developed the “Apparatus for Treating Air”—a machine that could actually cool the indoors—and everyone assumed it would instantly change the world." -- Publisher.