I posted about the dangers of fracking here and here back in February of this year.
If you missed it: The Oklahoma Corporation Commission is telling operators to shut down 35 disposal wells that may have played a role in a 5.6-magnitude earthquake that shook at least six states Saturday, Gov. Mary Fallin said.
The disposal wells, which are linked to fracking and other industries that need to dispose of toxic waste water by injecting it deep into the earth, have recently drawn concern that they may actually induce earthquakes.
CNN news Oklahoma Earthquake