 |
| air pollution: 131 phrases in 14 subjects |
| Agriculture | 4 |
| Environment | 69 |
| General | 11 |
| Health care | 3 |
| Labor law | 1 |
| Measuring instruments | 1 |
| Municipal planning | 1 |
| Name of organization | 8 |
| Natural resourses and wildlife conservation | 17 |
| Natural sciences | 2 |
| Taxes | 1 |
| Technology | 1 |
| Transport | 6 |
| United Nations | 6 |