A 'temperature inversion' traps pollutants from cities that would otherwise blow away. It also lets us see what we put into the atmosphere.pic.twitter.com/nAVyOc0Iy3
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First tweet was Almaty, Kazakhstan. This one is Salt Lake City. It's known to affect most major cities https://en.m.wikipedia.org/wiki/Inversion_(meteorology) …pic.twitter.com/RagUvRYRBx