PM₁₀ zarraawwan baay'ee xixiqqoo (PM₂.₅) fi zarraawwan isaan caalaa gurguddoo hanga maaykiroometira 10 bal'atan hammata. Maddoonni isaa awwaara daandii fi ijaarsaa, biyyee bubbeen kaasuu, boba'aa gubachuu fi zarraawwan qilleensa naannoo lafaa keessatti uumaman dabalatu. PM₁₀ zarraawwan gurguddoo qofa wajjin tokko miti: isaan kutaa maaykiroometira 2.5 fi 10 gidduu jiraniidha.
WHO: wantoota qilleensa faalanii fi fayyaa