Extended Data Fig. 3: Baseline associations between income, race, ethnicity and pollution exposure.
From: Disparate air pollution reductions during California’s COVID-19 economic shutdown

Relationships between pooled January-April 2019 PM2.5 and NO2 observations and census block group demographics, without controlling for other sources of heterogeneity. The line represents the best linear fit. Red text shows slope of fit line, *** indicates p < 1e-3; NS = not statistically significant.