Pennsylvania Fracking Linked to Earthquakes

The Pennsylvania Department of Environmental Protection recently released findings that link fracking activity to earthquakes in the state. 

Fracking has been tied to earthquakes in Ohio, Oklahoma and other states, but this is the first known linkage in Pennsylvania.

The full story is available here: http://www.cbsnews.com/news/fracking-caused-pa-earthquakes-state-regulators-say/