A cross-section illustration of fracking (right) versus conventional drilling for natural gas (left). Fracking, or hydraulic fracturing, is a controversial method of retrieving natural gas from about 1km below the earth's surface. A fluid is pumped down, fracturing a gas-rich shale layer and releasing gas, which is returned to the station. This illustration demonstrates how fracking can contaminate water supplies. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Garlick, Mark |
Taille de l’image : | 5551 px × 3626 px |
Model Release : | Non requis |
Restrictions : | - |