| Similarity | Rank | |
|---|---|---|
| air_pollution | 0.844 | 13199 |
| pollutant | 0.837 | 14162 |
| nitrogen_oxide | 0.830 | 78932 |
| particulate_matter | 0.829 | 54856 |
| sulfur_dioxide | 0.783 | 93673 |
| NOx | 0.779 | 71494 |
| ozone | 0.731 | 18722 |
| particulate | 0.726 | 43599 |
| air_quality | 0.724 | 15064 |
| smog | 0.721 | 39059 |
| greenhouse_gas | 0.700 | 18514 |
| soot | 0.693 | 42732 |
| pollution_from | 0.693 | 77604 |
| carbon_monoxide | 0.686 | 39006 |
| pollution | 0.683 | 4581 |
| emission | 0.681 | 4559 |
| improve_air_quality | 0.670 | 92085 |
| emission_from | 0.661 | 32492 |
| carbon_dioxide_emission | 0.658 | 61386 |
| greenhouse_gas_emission | 0.654 | 18703 |
| acid_rain | 0.642 | 69028 |
| carbon_dioxide | 0.640 | 11994 |
| Air_Quality | 0.635 | 61690 |
| dioxin | 0.633 | 55824 |
| Co_2_emission | 0.632 | 88444 |