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.
When you move, messages travel from the brain down the spinal cord. Messages also are carried up the spinal cord to the brain to allow you to feel sensations. The spinal cord also helps in controlling blood pressure, heart rate, and the temperature of the body. There are nerves that branch off the spinal cord. They are called spinal nerves. The nerves are divided into five main sections (from top to bottom): cervical, thoracic, lumbar, sacral, and cocygeal. They help control bodily functions such as breathing, urination, and bowel movements.