| Similarity | Rank | |
|---|---|---|
| stratospheric | 0.836 | 25293 |
| depletion | 0.807 | 11015 |
| stratosphere | 0.779 | 17932 |
| warming | 0.753 | 6577 |
| dioxide | 0.746 | 4762 |
| pollutant | 0.736 | 10281 |
| photochemical | 0.729 | 30345 |
| nox | 0.727 | 28969 |
| cfc | 0.724 | 9251 |
| tropospheric | 0.720 | 67421 |
| chlorofluorocarbon | 0.716 | 24061 |
| pollution | 0.716 | 2289 |
| atmospheric | 0.715 | 7829 |
| emission | 0.709 | 3620 |
| sulphur | 0.705 | 6647 |
| radiation | 0.705 | 4047 |
| ultraviolet | 0.704 | 15445 |
| carbon | 0.700 | 3195 |
| chlorine | 0.696 | 10537 |
| co2 | 0.691 | 18793 |
| nitrogen | 0.690 | 6386 |
| vocs | 0.686 | 67555 |
| &sub2; | 0.684 | 34174 |
| aerosol | 0.684 | 13164 |
| anthropogenic | 0.682 | 51620 |