| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 2952 | 
                                    
                                    72.8%
                                 | 
| 2 | Seldom | 311 | 
                                    
                                    7.7%
                                 | 
| 3 | Some times | 673 | 
                                    
                                    16.6%
                                 | 
| 4 | Very often | 120 | 
                                    
                                    3%
                                 | 
| var_concept.title | Vocabulary | 
|---|---|
| The presence of contaminants or pollutant substances in the air that do not disperse properly and that interfere with human health or welfare. | Air pollution | 
| Particles suspended in air after incomplete combustion of materials. | Smoke |