 |
| environment impact: 53 phrases in 21 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Aviation medicine | 1 |
| Caspian | 1 |
| Ecology | 8 |
| Environment | 4 |
| Foreign affairs | 1 |
| General | 9 |
| Makarov | 6 |
| Military | 2 |
| Nanotechnology | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
| Programming | 2 |
| Sakhalin | 4 |
| Sakhalin R | 3 |
| Technology | 1 |
| United Nations | 1 |
| Water supply | 1 |
| Weapons of mass destruction | 1 |