Sura 20

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Marktplatz – Kijerumani cha biashara | Kujifunza Kijerumani |Deutsche Welle

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Kukabiliana na Maji-takaVichafuzi, mitambo ya kusafisha maji-taka, kuondoa maji-taka: Jinsi ya kuhifadhi na kuhakikisha usafi wa maji.Mada: Maji-taka, utunzaji mazingira