| Similarity | Rank | |
|---|---|---|
| VOCs | 0.788 | 56195 |
| Ammonia | 0.694 | 78473 |
| NOx | 0.690 | 55787 |
| SO2 | 0.688 | 90224 |
| IAQ | 0.679 | 93590 |
| particulates | 0.668 | 55487 |
| Dioxide | 0.660 | 69551 |
| Chlorine | 0.659 | 54131 |
| Coatings | 0.658 | 61613 |
| refrigerants | 0.655 | 92454 |
| varnishes | 0.654 | 90969 |
| oxides | 0.651 | 42880 |
| solvents | 0.650 | 29089 |
| Formaldehyde | 0.647 | 99913 |
| particulate | 0.647 | 32316 |
| Sulfur | 0.642 | 70589 |
| Chloride | 0.640 | 78692 |
| Volatile | 0.640 | 77904 |
| sulfur | 0.638 | 22001 |
| ammonia | 0.635 | 21773 |
| Radon | 0.633 | 60232 |
| chlorine | 0.631 | 17545 |
| radon | 0.630 | 32433 |
| pollutants | 0.625 | 16074 |
| coatings | 0.624 | 20133 |