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
Ib tug Txiv Plig raug tua tuag lub sij hawm nws tawm mus pab tsoom pej xeem, hauv kev sib ntaus sib tuag ntawm His Xas Lais thiab Lis Npaas.
