Below is an excerpt from "Food Not Lawns". I need to read this book.

"French aristocrats popularized the idea of the green grassy lawn in the eighteenth century, when they planted the agricultural fields around their estates to grass, to send the message that they had more land than they needed and could therefore afford to waste some. Meanwhile, French peasants starved for lack of available ground, and the resulting frustration might have had something to do with the French Revolution in 1789.
Today, 58 million Americans spend approximately $30 billion every year to maintain over 23 million acres of lawn. That’s an average of over a third of an acre and $517 each. The same size plot of land could still have a small lawn for recreation, plus produce all of the vegetables needed to feed a family of six. The lawns in the United States consume around 270 billion gallons of water a week—enough to water 81 million acres of organic vegetables, all summer long."