 |
| проблема окружающей среды: 150 phrases in 17 subjects |
| Astronautics | 3 |
| Ecology | 30 |
| Economy | 4 |
| Energy industry | 60 |
| Environment | 2 |
| General | 5 |
| Makarov | 10 |
| Mass media | 1 |
| Military | 6 |
| Name of organization | 2 |
| NATO | 1 |
| Psychology | 1 |
| Sakhalin | 1 |
| Technology | 3 |
| United Nations | 17 |
| United States | 1 |
| Water supply | 3 |