| Similarity | Rank | |
|---|---|---|
| ozone | 0.753 | 5037 |
| greenhouse | 0.731 | 5662 |
| global | 0.717 | 2550 |
| depletion | 0.700 | 11015 |
| stratospheric | 0.691 | 25293 |
| cfc | 0.666 | 9251 |
| climatic | 0.651 | 9898 |
| desertification | 0.648 | 27119 |
| stratosphere | 0.645 | 17932 |
| icecap | 0.645 | 88649 |
| dioxide | 0.640 | 4762 |
| co2 | 0.636 | 18793 |
| atmospheric | 0.635 | 7829 |
| ipcc | 0.628 | 40905 |
| chlorofluorocarbon | 0.618 | 24061 |
| hcfc | 0.617 | 89263 |
| deforestation | 0.616 | 16781 |
| nox | 0.613 | 28969 |
| pollution | 0.611 | 2289 |
| tropospheric | 0.609 | 67421 |
| antarctic | 0.609 | 9187 |
| biodiversity | 0.609 | 24873 |
| glaciologist | 0.604 | 84899 |
| carbon | 0.602 | 3195 |
| pollutant | 0.601 | 10281 |