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.
A peripheral nerve injury may have the possibility of significant recovery after the initial trauma or may never recover. Recovery depends upon the type of nerve injury. Unless there has been an obvious direct injury to the nerve (a knife or a gunshot wound), it is impossible to know what type of injury has occurred to the nerve.