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. 2021 Dec 15;129(12):127005. doi: 10.1289/EHP8584

Figure 1.

Figures 1A to 1F are error graphs titled particulate matter begin subscript 2.5 end subscript, Nitrogen Dioxide, Ozone, Sulfur Dioxide, particulate matter begin subscript 10 end subscript, and Carbon Monoxide, plotting particulate matter begin subscript 2.5 end subscript (microgram meter cubed), ranging from 0 to 20 in increments of 10; Nitrogen Dioxide (parts per billion), ranging from 0 to 40 in increments of 20; Ozone (parts per billion), ranging from 0 to 60 in increments of 20; Sulfur dioxide (parts per billion), ranging from 0 to 12 in increments of 2; particulate matter begin subscript 10 end subscript (microgram per meter cubed), ranging from 0 to 60 in increments of 20; Carbon Monoxide (parts per million), ranging from 0 to 2 in unit increments (y-axis) across years, ranging from 1990 to 2010 in increments of 10 for Non-Hispanic White, Non-Hispanic Black, Hispanic, and Non-Hispanic Asian (x-axis), respectively.

Distribution of exposure to pollutants in years 1990, 2000, and 2010, stratified by racial/ethnic group, for (A) PM2.5, (B) NO2, (C) O3, (D) SO2, (E) PM10, and (F) CO. For all panels, the highest/lowest bound represents the 90th/10th percentile value, the box shows the 25th and 75th percentiles, and the horizontal line in the box represents the median. Color circles indicate the national population-weighted mean. PM2.5 has no estimates in 1990 because of a lack of monitoring data prior to 1999. Note: CO, carbon monoxide; Hispanic, Hispanic people of any race(s); NH, non-Hispanic; NO2, nitrogen dioxide; O3, ozone; PM2.5, fine particulate matter with aerodynamic diameter less than or equal to 2.5 micrometers; PM10 10 micrometers; SO2, sulfur dioxide.