Fracking is a commonly accepted term for hydro-fracturing, a process where water, sand and millions of gallons of toxic chemicals are injected into the earth at high pressure. The aim of hydro-fracturing is to fracture rock formations deep underground in the hopes of liberating natural gas that would be otherwise inaccessible, and to bring it to the surface.
With hydrofracking, a well can produce over a million gallons of waste water that is often laced with highly corrosive salts, carcinogens like benzene and radioactive elements like radium. Other carcinogenic materials can be added to the waste water by the chemicals used in the hydrofracking itself.
Through the processes of fracking, our underground water supplies (artesian wells / aquifers) are being poisoned. This is occurring in every continent on earth for the purpose of extracting more fossil fuels. Large companies are moving in on peoples property (which governments are allowing) and drilling for natural gas via fracking, and this process is destroying local water supplies.