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Since the introduction
of science into agriculture in the late 18th
century, science and engineering have powered enormous gains in agricultural
productivity through fertilizer production, plant breeding, and
mechanization. In some parts of the world, not one person in a hundred is
growing plants or raising animals for food. This frees the rest to make and
sell each other houses, hats, and video games, to be scientists and
politicians, artists, teachers, doctors, and talk-show hosts. In the
countries of the developed world, we buy what we eat in stores, or
restaurants, or fast food joints.
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