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. Author manuscript; available in PMC: 2021 Dec 1.

Published in final edited form as: Atmos Environ (1994). 2020 Aug 11;242:117818. doi: 10.1016/j.atmosenv.2020.117818

Figure 3. — NO₂, PM_2.5, and PM₁₀ concentrations standardized to PAH year 2001, compared to PAH concentrations. The missing annual averages are due to insufficient measurement days in those years.

Figure 3. — NO₂, PM_2.5, and PM₁₀ concentrations standardized to PAH year 2001, compared to PAH concentrations. The missing annual averages are due to insufficient measurement days in those years.