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Giving new meaning to the term “wood chip,” scientists in a woodsy part of the country have come up with a way to make biodegradable computer chips from trees. Zhenqiang Ma, a professor of electrical and computer engineering at the University of Wisconsin, says that he decided to pursue this line of research during a lunch break in 2007, when he read in an industry publication about the mountain of electronics discarded every year. —Scientists Develop Chips Made Mostly From Wood - WSJ