Fig. 5.

Evidence of wildfire smoke salience and behavioral changes at high smoke PM${}_{2.5}$ concentrations. (A) The number of Google searches for the term “Air Quality” increases with smoke PM${}_{2.5}$ concentrations; searches are measured using a normalized 0-100 index measuring relative popularity of a search term. (B and C) While the volume of traffic recorded by the California Department of Transportation on urban highways and the number of recreation visits to national parks in California do not change in response to low or moderate smoke levels, they decline in response to higher smoke PM${}_{2.5}$ concentrations.