Lorries transport the gas to market.Energy companies drill holes around 1.5 miles deep.Conductors send electrical currents into the
Marcellus shale.They remove the fracturing fluid, and sand keeps
the fissures open.The electricity causes the shale to fracture.Machines inject fracturing fluid into the bore hole.The natural gas flows to the surface and containers
collect it.The fracturing fluid makes the fissures expand.