Ntuj Hloov 5 yam teeb meem ntawm txhua yam nyob ib puag ncig uas peb yuav tsum xav txog (5 environmental problems) 5 yam teeb meem ntawm txhua yam nyob ib puag ncig uas peb yuav tsum xav txog. (5 environmental problems we to consider) 5 yam teeb meem no yog 5 yam uas ua teeb meem rau lub ntiaj teb zim txwv no, yog
Cov thawj coj lub Koom Txoos Mias Mas thiab Thaib, lees txog kev muab siab rau saib xyuas cov neeg thoj nam nyob raws ciam teb.
