Value | Category |
---|---|
1 | No |
2 | Seldom |
3 | Some times |
4 | Very often |
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 |
Audible sound from traffic, construction, and so on that may generate unpleasant and harmful effects ( hearing loss). It is measured in decibels. | Noise |