Coal used for this process is called steaming coal. In 2008 77% of the electricity generated in Australia was produced by coal fired power stations (includes black and brown coals). Some types of black coal are suitable for coke-making.
These symptoms may occur in the back, leg and down to the foot. The most common nerve irritation originating from the lumbar spine is Sciatica. This is an irritation of the sciatic nerve, which can produce pain, numbness, and weakness down the leg along the areas innervated by the sciatic nerve.
In some cases the nerve damage will go away over time, as the injured portion of the nerve heals or the inflammation goes away. In other cases, the symptoms are permanent unless the nerve damage can be repaired. Symptoms of surgical nerve damage: Symptoms include tingling or numbness in one area of the body. It may resemble pins and needles: It can result in pain, which is generally a severe burning pain. These symptoms may occur at the actual surgical site, or in distant parts of the body as the damaged nerve may supply these parts.