Komeza ibikorwa byawe bisanzwe byo hanze.
PM₂.₅ igizwe n'uduce duto cyane tw'ibintu turi mu mwuka. Inkomoko yatwo irimo gutwika ibicanwa mu binyabiziga, mu gushyushya amazu no mu nganda, ndetse n'inkongi z'umuriro. Tumwe muri utwo duce dukorwa iyo imyuka ikorana mu kirere. Kuba ari duto cyane bituma dushobora kugera mu ndiba y'ibihaha.
PM₁₀ ikubiyemo uduce duto cyane (PM₂.₅) n'uduce tunini kurushaho dufite umurambararo utarenze mikorometero 10. Inkomoko yatwo irimo ivumbi ryo mu mihanda n'iry'ubwubatsi, ubutaka butwarwa n'umuyaga, gutwika ibicanwa n'uduce dukorerwa mu kirere. PM₁₀ ntabwo ari uduce tunini twonyine: two ni igice gifite umurambararo uri hagati ya mikorometero 2.5 na 10.