New technology often creates unanticipated problems. Automobiles, for example, provide numerous benefits, but they also pollute the air and kill about fifty thousand Americans each year. It is difficult to imagine life without electricity, but the generation of electricity pollutes the air and cause the thermal pollution of rivers. Insecticides and chemical fertilizers have performed miracles in agriculture but have polluted food and streams, even kill some lakes. Jet planes, while helping us in many ways, cause air pollution and noise pollution near airport.
http://www.uproar.org/techpollution2.html
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