| |||
| Diffuse Quelle | |||
|
source de pollution diffuse : 6 phrases in 2 subjects |
| Environment | 4 |
| Natural resourses and wildlife conservation | 2 |
| |||
| Diffuse Quelle | |||
|
source de pollution diffuse : 6 phrases in 2 subjects |
| Environment | 4 |
| Natural resourses and wildlife conservation | 2 |