The range of 60-70 decibels sound pressure level is about as loud as normal conversation in 1 meter distance.
Flammable, Radioactive Sinkholes. Lesser known in the mainstream media, however, is frackingâs link to massive sinkholes appearing overnight and leaking radiation across the nation.
Fracking involves injection of a large volume of water, sand and a cocktail of chemicals (known as fracking fluid) deep underground to fracture the rock and allow gas to seep out. It is also used for oil extraction. (See EPA diagram at bottom.).