One of the first images from @CopernicusEU #Sentinel5P shows how #ozone is distributed around the world. While ozone in the stratosphere is a good thing, lower down in the atmosphere it is a harmful pollutant: https://t.co/O8t1A0qqv9#Tropomi pic.twitter.com/O9Iqj0yL5C
— ESA EarthObservation (@ESA_EO) December 1, 2017
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