Marktplatz - Deutsch In Der Wirtschaft | Learning German | Deutsche Welle
Marktplatz: Chapter 20
- Autor: Vários
- Narrador: Vários
- Editora: Podcast
- Duração: 0:14:49
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Sinopse
Getting Rid of Sewage Polluntants, sewage treatment plants, sewage removal: How water can be saved and kept clean. Topics: Sewage, environmental protection
