| Similarity | Rank | |
|---|---|---|
| air_pollution | 0.808 | 13199 |
| Air_Quality | 0.735 | 61690 |
| air_pollutant | 0.724 | 77087 |
| indoor_air_quality | 0.712 | 81240 |
| improve_air_quality | 0.701 | 92085 |
| environmental_quality | 0.690 | 55712 |
| water_quality | 0.681 | 8567 |
| particulate_matter | 0.658 | 54856 |
| pollution | 0.653 | 4581 |
| clean_air | 0.637 | 26063 |
| pollutant | 0.628 | 14162 |
| water_pollution | 0.626 | 34005 |
| smog | 0.620 | 39059 |
| ozone | 0.619 | 18722 |
| nitrogen_oxide | 0.618 | 78932 |
| environmental_health | 0.613 | 26406 |
| noise_pollution | 0.612 | 71288 |
| sulfur_dioxide | 0.609 | 93673 |
| greenhouse_gas_emission | 0.608 | 18703 |
| NOx | 0.603 | 71494 |
| human_health | 0.599 | 16472 |
| greenhouse_gas | 0.596 | 18514 |
| pollution_from | 0.591 | 77604 |
| carbon_emission | 0.588 | 20778 |
| pollution_control | 0.585 | 79900 |