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L’UOMO SPORCA L’ACQUA …. E L’ACQUA INQUINA IL TERRENO
L’ UOMO COSTRUISCE IMPIANTI PER PULIRE L’ACQUA
NOI PROVIAMO A FILTRARE L’ACQUA
STRUMENTI PER PULIRE L’ACQUA
SASSI, COLINI, CARTA ASSORBENTE
LO SPORCO SI DEPOSITA SUL FONDO.
by guest18319 | Added: 2 years ago
Language: Italian | Topic: Education
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