| Similarity | Rank | |
|---|---|---|
| gas-fired | 0.814 | 29954 |
| incineration | 0.812 | 18636 |
| lpg | 0.782 | 44069 |
| desulphurisation | 0.769 | 48583 |
| coal-fired | 0.767 | 21020 |
| low-sulphur | 0.767 | 51947 |
| fossil-fuel | 0.762 | 76055 |
| ozone-damaging | 0.760 | 88642 |
| biofuel | 0.756 | 57289 |
| gasification | 0.754 | 40725 |
| ozone-benign | 0.752 | 99646 |
| sulphur | 0.752 | 6647 |
| hydrocarbon | 0.752 | 12320 |
| fgd | 0.749 | 30166 |
| halon | 0.748 | 27495 |
| ozone-depleting | 0.748 | 40272 |
| dioxin | 0.746 | 17452 |
| incinerator | 0.745 | 14919 |
| desalination | 0.745 | 43951 |
| hydro-electric | 0.745 | 22386 |
| bioga | 0.744 | 50706 |
| oil-fired | 0.742 | 49906 |
| nox | 0.742 | 28969 |
| chlorofluorocarbon | 0.741 | 24061 |
| reprocessing | 0.740 | 73057 |