" Only in the last 200 years have we become dependent on nonrenewable minerals. Modern industry runs on the scarcest of the available forms of low entropy. Traditional technology (windmills, waterwheels, etc.) runs on the more abundant solar source. How ironic, therefore, to be told by technological optimists that modern technology is freeing man from dependence on resources (Barnett and Morse, 1963, p. 11). The very opposite is true. "
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