Reportaje del New York Times sobre el aumento de terremotos causados por el Fracking en Estados Unidos
U.S. Maps Pinpoint Earthquakes Linked to Quest for Oil and Gas - NYTimes.com
http://www.nytimes.com/2015/04/24/us/us-maps-areas-of-increased-earthquakes-from-human-activity.html?smid=tw-share&_r=0
U.S. Maps Pinpoint Earthquakes Linked to Quest for Oil and Gas - NYTimes.com
http://www.nytimes.com/2015/04/24/us/us-maps-areas-of-increased-earthquakes-from-human-activity.html?smid=tw-share&_r=0