A friend of mine just sent me this map of air pollution in San Francisco from the San Francisco Chronicle.
Using the latest PM2.5 data, I created a map for China using the same scale:
Based on that scale, China’s best city (which is Haikou, according to the World Health Organization database) would still be double the red limit here.
But I shouldn’t mock people for being worried about pollution. America’s PM2.5 levels are way lower than China’s, but studies in the US have still found those lower levels are harming our health.
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