 |
| biosphere: 68 phrases in 18 subjects |
| Astronautics | 8 |
| Biology | 4 |
| Ecology | 24 |
| Energy industry | 2 |
| Fish farming pisciculture | 1 |
| Forestry | 1 |
| General | 6 |
| Geology | 1 |
| Makarov | 2 |
| Medical | 2 |
| Military | 1 |
| Name of organization | 1 |
| Natural resourses and wildlife conservation | 3 |
| Oceanography & oceanology | 4 |
| Technology | 2 |
| Travel | 1 |
| United Nations | 4 |
| Water supply | 1 |