 |
| |||
| total amount of ozone; total ozone; total ozone amount; total amount | |||
|
ozone total : 16 phrases, 4 sujets |
| Environnement | 7 |
| Nations unies | 1 |
| Sciences de la vie | 7 |
| Sciences naturelles | 1 |
|
| |||
| total amount of ozone; total ozone; total ozone amount; total amount | |||
|
ozone total : 16 phrases, 4 sujets |
| Environnement | 7 |
| Nations unies | 1 |
| Sciences de la vie | 7 |
| Sciences naturelles | 1 |