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Smog in Shanghai, China

ChemMatters: how NASA Keeps Tabs on Air Pollution in Space

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What flies around the world 14 times a day and can detect global air pollution levels from space? It's NASA's Aura satellite, whose mission is to understand the changing chemistry of the Earth's atmosphere. This remarkable satellite can measure air quality across the entire planet in just 24 hours.  Watch the video here or find out more on https://youtube.com.