I don't know if they even used the same AQI when I was a kid in southern California in the 70s, but we used to have smog alerts once or twice a year, usually in the fall when the inversion layer was at its most powerful. LA really worked to clean up for the 1984 Olympics, and it seems like a lot of the changes stuck -- when I visit there now, it never seems as dirty as I remember.
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I'm here thinking I'm glad it's so easy to find DDR-era gas masks here, I'll buy one if I ever go to Beijing again :-D
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I don't know if they even used the same AQI when I was a kid in southern California in the 70s, but we used to have smog alerts once or twice a year, usually in the fall when the inversion layer was at its most powerful. LA really worked to clean up for the 1984 Olympics, and it seems like a lot of the changes stuck -- when I visit there now, it never seems as dirty as I remember.
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