 |
| environmental information: 111 phrases in 20 subjects |
| Astronautics | 14 |
| Audit | 2 |
| Ecology | 25 |
| Electronics | 1 |
| Energy industry | 17 |
| Environment | 2 |
| Foreign affairs | 1 |
| General | 2 |
| Makarov | 8 |
| Medical | 1 |
| Meteorology | 1 |
| Military | 3 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 1 |
| Oil and gas technology | 1 |
| Sakhalin | 1 |
| Technology | 11 |
| United Nations | 14 |
| Water supply | 4 |
| Weapons of mass destruction | 1 |