This book introduces the latest results in research and practice of industrial solid waste recycling in China's western regions, where more than 50% of the waste in the whole country was produced. With rapid development in recent years, the massive industrial solid waste has become a serious problem in China. This book summarizes information and results of several National Research Programs of China concerning the typical solid wastes of the metallurgical and energy industry in western China, such as magnesium slag, manganese slag, acid sludge of lead and zinc smelting, fly ash, steel slag and carbide slag. It will be highly beneficial to scholars and engineers of environmental science and engineering.