An EPA-sourced infographic published by Nature (nature.com/articles/s12276-020-0405-1) illustrating the relative sizes of ultrafine particles (UFPs at 0.1 µm), fine particles (PM2.5 at <2.5 µm), and coarse particles (PM10 at <10 µm) compared to human hair (50–70 µm) and fine beach sand (90 µm). The graphic shows that for equal total mass, a single 10 µm coarse particle equals 64 fine particles or 1,000,000 ultrafine particles.Open full document
Notes
An EPA-sourced infographic published by Nature (nature.com/articles/s12276-020-0405-1) illustrating the relative sizes of ultrafine particles (UFPs at 0.1 µm), fine particles (PM2.5 at <2.5 µm), and coarse particles (PM10 at <10 µm) compared to human hair (50–70 µm) and fine beach sand (90 µm). The graphic shows that for equal total mass, a single 10 µm coarse particle equals 64 fine particles or 1,000,000 ultrafine particles.
