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this is really cool!

it'd be even cooler if you could use data for some large, densely populated US cities as benchmarks, adjusted for time zone differences

I know anecdotally that the air in Chinese cities is bad, but I've never been really sure how much worse it is than say, LA, or NYC

Here's some good data for the Los Angeles area:



Click on "Historical Data" to create a graph.

Bottom line, LA seems to hover around 25 µg/m³.

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