From the Twitter feed of Robert Rohde, @rarohde, a few days ago:
The worst places for particulate air quality in the USA are still less polluted than the best air in eastern China. Thank you, EPA:
This is partly because the U.S. (with tacit consent from all of us) has outsourced its toxicity to China. But it's also because EPA regulation is effective. Unfortunately, the people who are now in charge of our government think it's no longer necessary.
The same day I saw this graph, I also came across a post on Grist called Photos: What America looked like before the EPA. The photos were shot in 1972, when the new agency had photographers documenting the country:
There are a few more on the Grist page, but to see more like this one...
...(and other photos of 1970s America that aren't so depressing), check out the full Flickr set.