Air Pollution Control : 54 phrases in 12 subjects |
Construction | 1 |
Diplomacy | 1 |
Ecology | 14 |
Energy industry | 16 |
General | 3 |
Makarov | 2 |
Medical | 7 |
Military | 2 |
Natural resourses and wildlife conservation | 1 |
Technology | 5 |
United Nations | 1 |
Weapons of mass destruction | 1 |