As a result of the fracking revolution, North America has overtaken Saudi Arabia as the world's largest producer of oil and gas. This, despite endless protests from environmentalists. But does drilling for natural gas really cause pollution levels to skyrocket?
Since records began in 1776, the people of Youngstown, Ohio had never experienced an earthquake. However, from January 2011, 109 tremors were recorded and new research in Geophysical Research-Solid Earth reveals how this may be the result of shale fracking.
US authorities have approved another plan to develop and test a geothermal reservoir using enhanced geothermal system (EGS) technology.
Further evidence has emerged that injection wells associated with fracking cause minor earthquakes.
The controversial technique for shale gas production known as fracking won't contaminate water sources, say researchers - as long as there's a safe distance between the injection source and water supplies.
A huge increase in the number of minor earthquakes across the middle of the US is almost certainly caused by wastewater injection from oil or gas drilling, including the controversial technique known as fracking.
Hydraulic fracturing of shale formations, or fracking, to extract natural gas doesn't cause groundwater contamination, a new report has found.