EMMELINE WATKINS / SCIENCE PHOTO LIBRARY EMMELINE WATKINS / SCIENCE PHOTO LIBRARY
Solar powered mobile phone mast. Antennas mounted on top of a Celtel mast powered by a solar panel (right). Celtel is a telecommunications company that provides network services in several African countries. Mobile phone communication networks operate by the transmission of radio signals between mobile phones and base stations. The solar panel converts solar energy into the electricity needed to power the antennas. Photographed in Tanzania, Africa.
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