Fig. 2: State-level and event-specific contributions to carbon monoxide (CO) emissions from vegetation and structure fires in the conterminous U.S.

A Average CO emissions (g/year) from vegetation burning (2002–2020) by state. B Average CO emissions (g/year) from structure burning (2000–2020) by state. C Ratio of CO emissions from structure burning in wildfires to total burned area of wildfires by state (2002–2020 average). State order follows (B). D Top 20 most destructive fires in terms of structure fuel loss from 2000 to 2020 across the conterminous U.S., with structure fire CO emissions (bars, left y-axis) and number of structures destroyed (line, right y-axis). Each x-axis label shows the state, year-month, and fire name. Bar colors indicate the U.S. state: CA (yellow), TN (dark blue), TX (orange), CO (green), OR (pink), NM (sky blue).