| Value | Category | Cases | |
|---|---|---|---|
| 1 | Industrial activities | 82 |
1.2%
|
| 2 | Waste burning | 429 |
6.5%
|
| 3 | Transportation | 119 |
1.8%
|
| 4 | Construction | 3 |
0%
|
| 5 | Others (specify | 42 |
0.6%
|
| 6 | household activities (furnaces, ...) | 74 |
1.1%
|
| Sysmiss | 5859 |