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| 空气排放: 30 phrases in 13 subjects |
| Automobiles | 2 |
| Construction | 1 |
| Earth sciences | 1 |
| Electronics | 4 |
| Environment | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Polymers | 1 |
| Refrigeration | 2 |
| Shipbuilding | 1 |
| Technology | 13 |
| United Nations | 1 |
| Wind Energy | 1 |
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