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appauvrissement de l'ozone
stratosphérique
| appauvrissement de l'ozone | |
| environ. | ozone decrease; ozone depletion; ozone diminution; ozone reduction; ozone decline |
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| ozone decrease; ozone depletion; ozone diminution; ozone reduction; ozone decline | |||
| appauvrissement de l'ozone: 6 phrases in 2 subjects |
| Environment | 5 |
| United Nations | 1 |