Natural gas drilling in recent days has been linked to potentially unhealthy levels of radium in drinking water supplies in Pennsylvania. Closer to home, state health officials monitoring air quality have
issued an ozone advisory for the Upper Green River Basin in west-central Wyoming – an area of steady drilling activity. Now comes word that activities related to the common drilling practice known as hydraulic fracturing, or “fracking,” may be causing a “swarm” of increasingly intense earthquakes in Arkansas.