Kev siv cov khib nyiab Ib qho dej num twg cuam tshuam nrog kev tsim cov khoom pov tseg. Cov tsiaj txhu muaj ntau nyob hauv ntiaj chaw, cov khib nyiab ntau yog tsim tawm....

Qhov teeb meem ecological ntawm khib nyiab pov tseg yog ib qho ntawm cov teeb meem niaj hnub no, uas ua kom muaj kev phom sij rau tib neeg kev noj qab haus huv, nrog rau kev phom sij rau ib puag ncig....

5 Lub Cim Rau Muag Daim Ntawv Pov Tseg Daim ntawv ib nrab-hnov qab Soviet kev lig kev cai ntawm kev muab cov ntawv pov tseg rov muaj dua tshiab: niaj hnub no muaj qhov rov thov dua rau daim ntawv rov ua dua tshiab....