| 1 | Changes in sensory are the most sensitive indicators of the presence of nitrogen dioxide . | |
| 2 | It also avoids the release of the pollutants sulphur dioxide and nitrogen dioxide. | |
| 3 | As an air pollutant, NO2 has several correlated activities. | |
| 4 | Researchers also blamed exposure to nitrogen dioxide, carbon monoxide and particulates for the increase. | |
| 5 | The waste gases coming from burning coal, oil and petrol include sulphur dioxide and nitrogen dioxide. |