Ever since early this century, electricity has become an essential part of our modern life. It is much used in both our life and production. We use electricity to light our houses, carry our messages through space, work cmnputers, show us the inside of our bodies, and drive all kinds of machines, such as washing machines, air conditioners, pumping stations and various machines on the production llne.
If there were no electric power, the modern world would be in great trouble. Many of our industries would cease production because the motors that power the machines would fail. The transportation systems would fall apart without a supply of electricity. Electric trains and trams would all stop, and motor vehicles could not be operated. For the same reason, aeroplanes could not fly. Probably the worst effect would be felt on the communication systems. The telephone, radlo, televlslon and radar would be put out of action. Therefore, there are two points we must pay attention to. First, we should save electricity and energy resources such as coal and oll with all our efforts because most of the electricity we use is produced by machine with coal or oil as fuel. On the other hand, people should also explore other sources of power, for instance, water power, sea tide, wind power, and the solar energy,energy from within the earth, and so on. Scientists have to discover a substance that will replace electricity.
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