| Similarity | Rank | |
|---|---|---|
| particulate | 0.777 | 32316 |
| particulates | 0.729 | 55487 |
| ppb | 0.727 | 68647 |
| pollutant | 0.721 | 41997 |
| NOx | 0.718 | 55787 |
| ozone | 0.698 | 18222 |
| SO2 | 0.695 | 90224 |
| emission | 0.692 | 13146 |
| pollutants | 0.689 | 16074 |
| emissions | 0.689 | 4569 |
| pollution | 0.689 | 5841 |
| contaminant | 0.666 | 45441 |
| turbidity | 0.663 | 71435 |
| radioactivity | 0.661 | 42842 |
| dioxide | 0.659 | 10273 |
| GHGs | 0.657 | 91201 |
| VOCs | 0.652 | 56195 |
| PAHs | 0.651 | 93057 |
| CO2 | 0.648 | 9992 |
| cesium | 0.647 | 91358 |
| GHG | 0.646 | 30079 |
| ppm | 0.646 | 23860 |
| arsenic | 0.643 | 26971 |
| precipitation | 0.640 | 20056 |
| oxides | 0.639 | 42880 |