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| экологические ценности | |||
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| экологическая оценка | |||
| ценность как экологически чистого энергоресурса (природного газа) | |||
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ecological values : 3 phrases in 3 subjects |
| Brazil | 1 |
| Geobotanics | 1 |
| Makarov | 1 |
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