Fig. 4. Disparities in the racial-ethnic composition of the near-warehouse population.

A The relative difference in the racial and ethnic composition of census tracts containing warehouses and the overall U.S. median demographics. This difference is calculated for all tracts containing a warehouse or multiple warehouses (“Any”) and tracts discretized into deciles corresponding to the number of warehouses in each tract (“Clustering decile”). Bars marked with “n” denote differences between demographics at warehouses and national median demographics that are not statistically significant using a two-sample Kolmogorov-Smirnov Test. B The relative difference in population-weighted NO₂ averaged near warehouses for different population subgroups and the overall population-weighted NO₂ near warehouses.