| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Human Activity | 515 |
42.9%
|
| 2 | Natural processes | 134 |
11.2%
|
| 3 | Both human activity and natural processes | 208 |
17.3%
|
| 4 | None of these | 31 |
2.6%
|
| 7 | Not Applicable | 246 |
20.5%
|
| 8 | Refused | 8 |
0.7%
|
| 9 | Don’t know / Haven’t heard enough | 58 |
4.8%
|