Kutseketsa, mpweya wabwino, kuchotsa formaldehyde, kuyang'anira nthawi yeniyeni, nthawi yothamanga kwambiri, kusefa PM2.5
1.formaldehyde kusefera
2.sefa utsi
3. kusefera fumbi
4.toluene kusefera
5.sefera wa utsi wachiwiri
6.sefa kwa bakiteriya
7.kusefa fungo
8.tvoc kusefa