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| улучшение окружающей среды: 38 phrases in 15 subjects |
| Aviation medicine | 1 |
| Business | 1 |
| Diplomacy | 1 |
| Ecology | 13 |
| Energy industry | 2 |
| Environment | 1 |
| European Bank for Reconstruction and Development | 7 |
| General | 4 |
| Hydraulic engineering | 1 |
| Makarov | 1 |
| Medical | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Water supply | 2 |
| Wood processing | 1 |