Litsamaiso tse 3 tse ntle ka ho fetisisa tsa ho hloekisa metsi 'marakeng hona joale
Likarolong tse ngata tsa US le linaheng tse tsoetseng pele, batho ba na le metsi a nooang a hloekileng. Leha ho le joalo, metsi a ntse a ka ba le litšila tse kang nitrate, libaktheria, esita le chlorine tse ka etsang hore metsi a hau a pompo a latsoe hampe. Mokhoa o mong oa ho etsa hore metsi a hau a hloeke ...
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