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.
Unfortunately, problems in the neck/shoulder or back/hip can also effect the lower arm or leg due to pinching of nerves. Deep aching nerve pai n or numbness may develop which travels into the elbow/forearm/hand or hip/leg/foot.pinal nerves carry messages from the brain directing your organs to function properly. Spinal soreness and pain can be an indication that spinal nerves may not be functioning normally. Good health depends on good spinal nerve supply to your organs.