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Fascinating little tidbit: the EPA estimated the implementation cost of the Clean Air Act from 1970 to 1990 as costing about $523 billion 1990 dollars. That's about 1% of US GDP over the same period.
The reason this is interesting: looking at the NAS's recent report on negative carbon emission technologies, many cost less than $20 per tonne of CO2 removed. The US produces ~5 Gt of CO2/yr. If the $20 was scalable, that would be well under 1% of GDP. ( https://www.nap.edu/catalog/25259/negative-emissions-technologies-and-reliable-sequestration-a-research-agenda … )
Of course "If scalable" is bearing a huge load in that tweet!
Since you're doing the research, have you seen a figure re the number of asthma cases that would have happened had the NAAQS criteria pollutants not been implemented during that time period ? Cost of treating these diseases/ deaths that didn't happen ?
I haven't. But I believe the EPA looked at it in some of the reports. This may have it (I haven't checked): https://www.epa.gov/sites/production/files/2015-06/documents/contsetc.pdf …
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