Fracking shakes the American west: ‘a millennium’s worth of earthquakes’

Oklahomans don’t blink when they hear warnings about tornadoes, drought or ice-storms. Earthquakes, however, catch their attention.

The Guardian, 10 January 2016

http://www.theguardian.com/environment/2016/jan/10/fracking-earthquakes-oklahoma-colorado-gas-companies