 |
| |||
| quantité de la poussière | |||
|
dust quantity : 4 phrases in 2 subjects |
| Coal | 1 |
| Natural resourses and wildlife conservation | 3 |
|
| |||
| quantité de la poussière | |||
|
dust quantity : 4 phrases in 2 subjects |
| Coal | 1 |
| Natural resourses and wildlife conservation | 3 |