| Similarity | Rank | |
|---|---|---|
| fracturing | 0.862 | 29911 |
| Fracking | 0.847 | 62210 |
| oilsands | 0.840 | 96475 |
| shale | 0.776 | 17984 |
| drilling | 0.769 | 8037 |
| drillers | 0.750 | 78745 |
| Shale | 0.721 | 29866 |
| Enbridge | 0.718 | 59217 |
| Marcellus | 0.709 | 34448 |
| CSG | 0.703 | 64462 |
| groundwater | 0.696 | 17131 |
| methane | 0.690 | 19799 |
| fluoridation | 0.685 | 54615 |
| TransCanada | 0.677 | 78605 |
| coal | 0.673 | 5233 |
| aquifers | 0.673 | 48296 |
| polluters | 0.670 | 54299 |
| MTBE | 0.668 | 96906 |
| tailings | 0.663 | 49890 |
| polluting | 0.659 | 28346 |
| pipelines | 0.658 | 21092 |
| toxics | 0.658 | 88988 |
| hydraulic | 0.657 | 13689 |
| coal-fired | 0.656 | 36383 |
| BP's | 0.655 | 51410 |