| Share | Phrase |
|---|
| 36.86% | noxious [producing effect] component |
| 14.67% | noxious [producing effect] emission |
| 8.73% | noxious [producing effect] gas |
| 6.93% | noxious [producing effect] substance |
| 6.52% | noxious [producing effect] content |
| 5.17% | noxious [producing effect] constituent |
| 4.87% | noxious [producing effect] fume |
| 4.87% | noxious [producing effect] ingredient |
| 3.35% | noxious [producing effect] pollutant |
| 2.58% | noxious [producing effect] compound |
| 1.23% | noxious [producing effect] matter |
| 1.06% | noxious [producing effect] material |
| 1.05% | noxious [producing effect] by-product |
| 1.05% | noxious [producing effect] product |
| 0.96% | noxious [producing effect] oxide |