Extended Data Fig. 4: PM2.5 concentration in Canada and U.S. attributable to wildfires in each region.
From: Long-range PM2.5 pollution and health impacts from the 2023 Canadian wildfires
a,b, The 2023 annual mean PM2.5 concentrations (μg m–3) over Canada related to Canadian fires (a) and the U.S. fires (b). c,d, The 2023 annual mean PM2.5 concentrations (μg m–3) over the U.S. related to Canadian fires (c) and the U.S. fires (d).
