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.
Diyokiside ya sufure (SO₂) ni umwuka utagira ibara. Inkomoko zayo z'ingenzi zirimo gutwika ibicanwa birimo sufure, nk'amakara yo mu butaka na peteroli, mu gushyushya amazu, mu gutanga amashanyarazi no mu bikorwa by'inganda.
EEA: ibihumanya umwuka bikunze kuboneka · WHO: ibihumanya umwuka n'ubuzima
Diyokiside ya azote (NO₂) ikomoka ahanini ku gutwika ibicanwa mu binyabiziga, mu gushyushya amazu, mu gutanga amashanyarazi no mu nganda. Amashyiga ya gazi n'ibindi bikoresho bitwika ibicanwa bishobora na byo kuyisohora mu nzu. Igira uruhare mu ikorwa rya ozone n'uduce duto cyane mu kirere.