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.
Sciatica can be very debilitating, however, there are a few tricks that can help soothe sciatic nerve pain and decrease inflammation. 1. Massage. Massaging the muscles of the buttocks and backs of the legs (where the sciatic nerve runs) can loosen muscle tension and decrease painful nerve inflammation. How? Massage promotes blood circulation which will ease sciatic nerve tenderness and built up tension.