Coal powers a majority of our electricity here in Australia, and is a major export as well. There are several different types of coal, but they all stem from the same place. Different types of coal translate to different rankings of the same coal. In other words, all coal evolves from the same material, but the different types result from varying points in the evolution of that material.
Ginger is also sometimes used for chest pain, low back pain, and stomach pain. Some people pour the fresh juice on their skin to treat burns. The oil made from ginger is sometimes applied to the skin to relieve pain. In foods and beverages, ginger is used as a flavoring agent. In manufacturing, ginger is used as for fragrance in soaps and cosmetics. One of the chemicals in ginger is also used as an ingredient in laxative, anti-gas, and antacid medications.
Ginger extracts have been shown to have both antioxidant, anti-inflammatory and anti-tumor effects on cells. To investigate the latter, Dr Liu examined the effect of a whole ginger extract containing 5% gingerol on a number of different ovarian cancer cell lines.