That’s completely hypothetical and easily refutable by rural/urban breakdown, county-level breakdowns, outperformance by poor Asians, historical LA smog, etcetera.
no, subcounty level breakdowns actually support the thesis that higher pollution is at least correlated with lower educational attainment. Don't post misinformation. "historical LA smog" isn't a statement that refutes anything. The international consensus is that pollution is bad for educational attainment as well as other iq-like metrics, this is true in India, China, Brazil, and the UK, as well as impacts of prenatal exposure being bad in NYC and internationally.