| Similarity | Rank | |
|---|---|---|
| so2 | 0.902 | 62009 |
| &sub2; | 0.900 | 34174 |
| c02 | 0.863 | 50452 |
| tetrachloride | 0.858 | 38419 |
| co2 | 0.857 | 18793 |
| vocs | 0.844 | 67555 |
| sulphur | 0.839 | 6647 |
| hexafluoride | 0.838 | 78594 |
| mtbe | 0.837 | 87435 |
| ozone-depleting | 0.835 | 40272 |
| nitrous | 0.835 | 29606 |
| halon | 0.834 | 27495 |
| trioxide | 0.834 | 83599 |
| fluorocarbon | 0.832 | 92192 |
| ozone-destroy | 0.831 | 88366 |
| refrigerant | 0.831 | 52632 |
| chlorofluorocarbon | 0.829 | 24061 |
| carbon-dioxide | 0.826 | 95251 |
| ozone-damaging | 0.824 | 88642 |
| phosgene | 0.824 | 98640 |
| fossil-fuel | 0.822 | 76055 |
| particulate | 0.822 | 25930 |
| hcfc | 0.819 | 89263 |
| hfc | 0.817 | 66988 |
| anthropogenic | 0.815 | 51620 |