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Mother Nature Network • Think air quality doesn’t matter? Look at...

25

Apr

Think air quality doesn’t matter? Look at Pittsburgh in the 1940s
Before clean air laws were passed in Pittsburgh, smoke left buildings in a nighttime shroud — even in the morning.

Think air quality doesn’t matter? Look at Pittsburgh in the 1940s

Before clean air laws were passed in Pittsburgh, smoke left buildings in a nighttime shroud — even in the morning.

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    Pittsburgh in the 1940s Before clean air laws were passed in Pittsburgh, smoke left buildings in a nighttime shroud —...
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    Just learned about this in Chem.
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