| history of hydraulic fracturing | 0.47 | 0.9 | 797 | 31 | 65 |
| history of hydraulic fracking | 1.69 | 0.4 | 7152 | 29 | 23 |
| hydraulic fracturing regulations history | 0.95 | 1 | 595 | 40 | 56 |
| facts about hydraulic fracturing | 0.84 | 0.6 | 3632 | 32 | 32 |
| what is hydraulic fracturing | 1.15 | 0.8 | 9353 | 28 | 92 |
| the process of hydraulic fracturing | 0.77 | 0.4 | 5759 | 35 | 36 |
| who invented hydraulic fracking | 1.31 | 0.1 | 147 | 31 | 19 |
| explain the process of hydraulic fracturing | 1.52 | 0.2 | 6406 | 43 | 64 |
| recent advances in hydraulic fracturing | 0.06 | 0.8 | 7058 | 39 | 22 |
| describe the process of hydraulic fracturing | 0.59 | 0.4 | 371 | 44 | 7 |
| definition of hydraulic fracturing | 0.74 | 1 | 8759 | 34 | 98 |
| what is hydraulic fracturing process | 1.67 | 1 | 6286 | 36 | 12 |
| mechanics of hydraulic fracturing | 1.4 | 1 | 3136 | 33 | 48 |
| what is the purpose of hydraulic fracturing | 1.6 | 0.8 | 1056 | 43 | 65 |
| simple definition hydraulic fracturing | 1.28 | 0.2 | 6957 | 38 | 47 |
| hydraulic fracturing fact sheet | 1.42 | 0.6 | 1687 | 31 | 48 |
| hydraulic fracturing oil and gas | 1.14 | 0.8 | 1384 | 32 | 5 |
| what is fracking hydraulic fracturing | 1.96 | 1 | 3118 | 37 | 87 |
| hydraulic fracturing well cycle | 0.99 | 1 | 2039 | 31 | 40 |
| hydraulic fracturing definition for kids | 1.51 | 0.6 | 2060 | 40 | 16 |
