1. Kuchuluka kwa ayoni omwe amatulutsidwa ndi okwera, kufika kupitirira 8 miliyoni / masentimita³
2. Chotsani formaldehyde, fumbi, utsi, PM2.5, etc.
3. Zonyamula, ogwiritsa ntchito amatha kuziyika momasuka nthawi iliyonse komanso kulikonse
4. Kuwongolera batani limodzi, kosavuta komanso kosavuta kugwiritsa ntchito
5.Kapangidwe kachete, phokoso ndilotsika kuposa 30dB