1. Cov khoom lag luam siab: Cov khoom loj ntawm cov khoom siv sib txawv yog siv los ua kom muaj kev cuam tshuam ntau ntawm cov pa, dej, carbon dioxide, thiab ntxhiab tsw carbon.
2. Ruaj Ntseg: roj ua tsis tau zoo, noo noo tsis kam, kev txuag kev txuag, cov khoom siv ntxhiab, ntim khoom zoo, thiab ntim khoom zoo, thiab ntim khoom siv tau zoo, thiab ntim khoom zoo, thiab ntim khoom nyob rau hauv, thiab ntim khoom.
3. Tus nqi qis: piv nrog iav ntim, txhuas ntawv ntim, ntim ntim, lub hnab nqus dej muaj cov txiaj ntsig zoo ib yam kom ua tiav tib lub txiaj ntsig. Vim tias cov txheej txheem yooj yim, tus nqi tsim tawm cov khoom ua yeeb yaj kiab tuaj yeem raug txo los ntawm 10-20% piv nrog cov yeeb yaj kiab qhuav thiab lwm cov yeeb yaj kiab sib xyaw
4. Cov ntsiab lus tshwj xeeb: nws tuaj yeem ua tau raws li koj cov kev xav tau rau cov khoom sib txawv.
