| Similarity | Rank | |
|---|---|---|
| air_pollution | 0.791 | 13199 |
| air_pollutant | 0.721 | 77087 |
| pollution | 0.705 | 4581 |
| particulate_matter | 0.694 | 54856 |
| sulfur_dioxide | 0.686 | 93673 |
| soot | 0.685 | 42732 |
| nitrogen_oxide | 0.661 | 78932 |
| acid_rain | 0.644 | 69028 |
| pollutant | 0.642 | 14162 |
| pollution_from | 0.640 | 77604 |
| particulate | 0.633 | 43599 |
| ozone | 0.632 | 18722 |
| air_quality | 0.620 | 15064 |
| dust_storm | 0.615 | 99526 |
| greenhouse_gas | 0.603 | 18514 |
| NOx | 0.599 | 71494 |
| emission | 0.592 | 4559 |
| smoke_from | 0.588 | 59694 |
| carbon_monoxide | 0.574 | 39006 |
| water_pollution | 0.574 | 34005 |
| fume | 0.573 | 27873 |
| haze | 0.570 | 19051 |
| carbon_emission | 0.567 | 20778 |
| fog | 0.563 | 10465 |
| carbon_dioxide_emission | 0.562 | 61386 |