Topic: Energy in Depth
A Duke University study finds high methane levels in ground water near where fracking, or hydraulic fracturing, has occurred. Fracking is a controversial practice to extract natural gas from shale.
05/09/2011 08:58 pm
The natural-gas production industry has resisted providing information about fracking or hydraulic fracturing chemicals, which some say have fouled drinking-water wells.
09/09/2010 09:30 pm