Ku ya 17 Ukwakira 2013, Ikigo mpuzamahanga gishinzwe ubushakashatsi kuri kanseri, ishami ry’umuryango w’abibumbye ryita ku buzima, cyasohoye raporo ku nshuro ya mbere ko ihumana ry’ikirere ari kanseri ku bantu, kandi ibintu nyamukuru byangiza ikirere ni ibintu byangiza.
Mu bidukikije, ibintu bigize ikirere birimo umusenyi n'umukungugu uzanwa n'umuyaga, ivu ry'ibirunga ryatewe no guturika kw'ibirunga, umwotsi n'umukungugu biterwa n'umuriro w'amashyamba, umunyu wo mu nyanja wuka mu mazi yo mu nyanja uhura n'izuba, hamwe n'ibihingwa by'ibimera.
Hamwe niterambere ryumuryango wabantu no kwagura inganda, ibikorwa byabantu nabyo bisohora ibintu byinshi mubice byikirere, nka soot biva mubikorwa bitandukanye byinganda nko kubyara amashanyarazi, metallurgie, peteroli, na chimie, imyotsi yo guteka, umunaniro uva imodoka, itabi n'ibindi
Ibice byo mu kirere bigomba guhangayikishwa cyane ningingo zidashobora guhumeka, bivuga ibintu byingirakamaro hamwe na diameter ya aerodynamic ihwanye na diameter iri munsi ya 10 mm, ari yo PM10 dukunze kumva, kandi PM2.5 iri munsi ya 2,5 mkm .
Iyo umwuka winjiye mu myanya y'ubuhumekero y'umuntu, umusatsi w'amazuru hamwe na mucosa yo mu mazuru birashobora guhagarika byinshi mu bice, ariko biri munsi ya PM10 ntibishobora.PM10 irashobora kwirundanyiriza mu myanya y'ubuhumekero yo hejuru, naho PM2.5 irashobora kwinjira muri bronchioles na alveoli.
Bitewe nubunini bwacyo hamwe nubuso bunini bwihariye, ibintu byangiritse birashoboka cyane ko byongera ibindi bintu, bityo rero ibitera indwara yayo biragoye, ariko icy'ingenzi ni uko bishobora gutera indwara zifata umutima, indwara z'ubuhumekero na kanseri y'ibihaha.
PM2.5, ubusanzwe twitaho, mubyukuri ibara igice gito cyibice bidahumeka, ariko kuki twita cyane kuri PM2.5?
Birumvikana ko kimwe giterwa no kumenyekanisha itangazamakuru, ikindi ni uko PM2.5 ari nziza kandi yoroshye kwinjiza imyanda ihumanya hamwe n’ibyuma biremereye nka hydrocarbone ya polycyclic aromatic, ibyo bikaba byongera cyane amahirwe ya kanseri, teratogene, na mutagenic.
Igihe cyo kohereza: Werurwe-16-2022