In Uncommon Friends: Life with Thomas Edison, Henry Ford, Harvey Firestone, Alexis Carrel and Charles Lindbergh, author James Newton describes something Edison said to Ford and Firestone. Apparently, Edison began with a remark about natural resource depletion: "We are like tenant farmers, chopping down the fence around our house for fuel, when we should be using nature's inexhaustible sources of energy—sun, wind, and tide."
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