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.
Lumbar Radiculopathy (Sciatica) Lumbar radiculopathy (often known as Sciatica) refers to symptoms of pain, tingling, numbness or weakness that travel down the low back and into the leg or extremity. The sciatic nerve is the largest nerve in the body and exits the spinal cord as several nerve roots which join to form the sciatic nerve.