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NASA’s new air pollution sensor will monitor smog above America in real time

Satellites have been used to measure air pollution from space for years. For the first time, a space-borne smog sensor will be able to provide data on distribution of air pollutants over America non-stop and in real time. 

The new sensor, called Tropospheric Emissions: Monitoring of Pollution, or TEMPO, will be the first instrument of its kind that will measure concentrations of dangerous air pollutants from geostationary orbit, the ring 22,000 miles (36,000 kilometers) above the equator where satellites remain over a fixed spot on Earth

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