| Similarity | Rank | |
|---|---|---|
| carbon_dioxide | 0.710 | 11994 |
| Co_2 | 0.659 | 19859 |
| CO2 | 0.652 | 9699 |
| methane | 0.652 | 14641 |
| nitrogen | 0.637 | 11773 |
| carbon_monoxide | 0.628 | 39006 |
| ammonia | 0.624 | 28243 |
| greenhouse_gas | 0.619 | 18514 |
| nitrogen_oxide | 0.618 | 78932 |
| combustion_of | 0.598 | 77006 |
| sulfur_dioxide | 0.593 | 93673 |
| nitric_oxide | 0.582 | 68359 |
| ozone | 0.576 | 18722 |
| NOx | 0.574 | 71494 |
| combustion | 0.560 | 26558 |
| water_vapour | 0.559 | 85308 |
| anesthetic | 0.557 | 62398 |
| nitrate | 0.554 | 26529 |
| morphine | 0.553 | 40163 |
| oxygen | 0.551 | 6930 |
| particulate | 0.546 | 43599 |
| GHG | 0.546 | 70082 |
| O_2 | 0.545 | 92339 |
| sedation | 0.545 | 56183 |
| emission | 0.544 | 4559 |