"Hydraulic fracturing in a well for shale gas development, which involves injection of fluids to fracture the shale and release the gas up the well, has been confirmed as the cause for small felt seismic events at one location in the world, " the report states.
You are correct that the entire lifecycle of a gaswell using current advances in horizontal drilling and hydraulicfracturing needs to be safe and secure.
Today the Obama administration tightened oil and gas industry regulations, forcing drillers to capture air pollutants released during well construction including during hydraulicfracturing (fracking) in new wells.