Imikhawulo yokuqhuma isukela 3.8% ku 21.0%.
Ubuthi obuphezulu, le nto ingamuncwa ngesikhumba. Isilinganiso esiphezulu esivumelekile emoyeni ngu 18 mg/m3.
Imikhawulo yokuqhuma isukela 3.8% ku 21.0%.
Ubuthi obuphezulu, le nto ingamuncwa ngesikhumba. Isilinganiso esiphezulu esivumelekile emoyeni ngu 18 mg/m3.
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