Fig. 2: The 2023 annual mean PM2.5 exposure in Canada and the USA owing to fires from different source regions.
From: Long-range PM2.5 pollution and health impacts from the 2023 Canadian wildfires
Each cell in the grid shows population-weighted mean PM2.5 concentrations in each impacted region of Canada and the USA (indicated by the column) by fire source regions (indicated by the row). The definition of wildfire source regions in Canada and the USA are presented in Extended Data Fig. 3b, and the impacted regions are defined in Extended Data Fig. 3c. ‘Other fires’ means fires from other global regions apart from Canada and the USA.
