The term "gas drilling" refers to a method used for extracting natural gas from underground reservoirs. This process involves drilling deep into the earth's crust and then injecting high-pressure water, sand or chemicals into the rock formations in order to fracture them and release the trapped gas. The technique is also known as hydraulic fracturing or fracking. Gas drilling has become a popular method for extracting natural gas from shale deposits, which were previously considered too difficult or expensive to exploit. However, this method of extraction has raised concerns about its environmental impact and the potential contamination of groundwater supplies.