PETER BOWATER / SCIENCE PHOTO LIBRARY PETER BOWATER / SCIENCE PHOTO LIBRARY
Solar-powered emergency telephone being used by a motorist. His malfunctioning car is at right. The solar panel (blue, upper left) converts the energy of sunlight into electricity to power the telephone. The telephone is used to call for help, and the signal is transmitted by the antenna (above solar panel). Photographed in France.
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