Sterilization, afẹfẹ titun, yiyọ formaldehyde, ibojuwo akoko gidi, akoko iyara pupọ, sisẹ PM2.5
1.formaldehyde ase2.smog ase3. eruku ase4.toluene ase5.second-hand èéfín ase6.bacterial ase7.õrùn sisẹ8.tvoc sisẹ