The Egyptians knew that limestone is a great conductor for free energy. "The conductivity (o) is equal to 1/p ohm 1. centimetre-1 (or termed mhos/cm). Now, the use of limestone in energy production has several benefits. It can be used to produce both electric and thermal energy, and it is environmentally friendly because it does not produce emissions. Eextraction from the ground is relatively easy, which means that it can be used in places where other forms of energy are not possible or desirable. Benefits of using limestone in energy production is its ability to produce powerful acids. Hydrochloric acid is a potent oxidizer and can break down crude oil into molecules that are easier to remove from water bodies. Moreover, hydrochloric acid can also clean up environmental pollution such as sulfur dioxide and nitrogen oxide."