Workers connect pumps to transport trucks at a Heckmann Water Resources (HWR) treatment plant that separates oil, sediment and water mixed during the hydraulic fracturing process, near Shreveport, Louisiana, U.S., on Friday, Dec. 9, 2011. Water-service companies help manage the chemical-tainted water that's a byproduct of oil and natural gas drilling and production; cleaning and recycling it for re-use, and hauling it away for disposal. Photographer: Jason Janik/Bloomberg
Government scientists are focusing
on the disposal of wastewater from oil and gas drilling as the
possible cause of scores of earthquakes that have shaken the
central part of the U.S. since 2000, according to a study.
Megan Hughes reports on Bloomberg Television's "Bottom Line."
Running Time: 02:03