| Similarity | Rank | |
|---|---|---|
| nitrogen_oxide | 0.758 | 78932 |
| sulfur_dioxide | 0.749 | 93673 |
| particulate_matter | 0.721 | 54856 |
| NOx | 0.708 | 71494 |
| methane | 0.697 | 14641 |
| carbon_dioxide | 0.694 | 11994 |
| ammonia | 0.694 | 28243 |
| air_pollutant | 0.686 | 77087 |
| formaldehyde | 0.676 | 47313 |
| benzene | 0.667 | 50027 |
| ozone | 0.664 | 18722 |
| soot | 0.655 | 42732 |
| particulate | 0.653 | 43599 |
| radon | 0.648 | 66432 |
| Co_2 | 0.639 | 19859 |
| water_vapor | 0.637 | 40856 |
| CO2 | 0.631 | 9699 |
| water_vapour | 0.630 | 85308 |
| toluene | 0.630 | 94465 |
| combustion | 0.630 | 26558 |
| nitrous_oxide | 0.628 | 58827 |
| propane | 0.628 | 42218 |
| combustion_of | 0.625 | 77006 |
| oxygen | 0.622 | 6930 |
| vapor | 0.622 | 29093 |