Environment: Watching the Earth

The Stockholm conference has approved a global system for the monitoring of pollution. Next month, as a forerunner of such a system, the U.S. plans to launch an experimental satellite, known as ERTS (for Earth Resources Technology Satellite). A stubby, 1,965-lb. package that resembles an overgrown moth, the satellite will be equipped with three television cameras, a multi-wave-length sensor and a data collection system that can relay environmental information from as many as 1,000 automatic monitoring stations on earth. If the test is successful, ERTS-type orbiters could be used to sound an alarm whenever there is a threat of serious environmental...

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