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jan 1, 1926 - First large scale survey of air pollution in U.S., in Salt Lake City.

Description:

First large scale survey of air pollution in U.S., in Salt Lake City.

Added to timeline:

Health and Wellness

Bychyelle Jiazten milgrom

9 Nov 2019

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520

Date:

jan 1, 1926

Now

~ 99 years ago

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