 |
| natural environments: 91 phrases in 23 subjects |
| Advertising | 1 |
| Astronautics | 12 |
| Construction | 4 |
| Corporate governance | 1 |
| Diplomacy | 3 |
| Ecology | 7 |
| Economy | 1 |
| Electronics | 1 |
| General | 20 |
| Geography | 1 |
| Law | 5 |
| Makarov | 7 |
| Medical | 1 |
| Name of organization | 2 |
| Natural resourses and wildlife conservation | 5 |
| Oil and gas | 2 |
| Production | 1 |
| Research and development | 1 |
| Statistics | 1 |
| Technology | 1 |
| United Nations | 10 |
| United States | 1 |
| Water supply | 3 |