I live close to the site of the Marshall fire in Colorado which destroyed a thousand homes at the end of 2021. The amount of soot was surprisingly large. After post-fire snowfalls, snow pushed to the edges of parking lots was blacker than usual, probably from soot already on the ground that got scraped up with the snow. The other day I saw a couple of workers shovel soot off the Costco roof into a truck. In addition to more soot than I expected, it was more toxic (according to local reports) from all the plastics and chemicals that were burned.