This technical review covers the most comnionly used methods of extractive metallurgy and the equipment to produce nickel and nickel products. It is divided into two parts: Environmental Aspects of Nickel Production - Part I: Suiphide Pyrometallurgy and Nickel Refining; and Environmental Aspects of Nickel Production - Part II: Laterite Pyrometallurgy and Hydrometallurgy, and Ferronickel Smelting. (To be prepared separately). The review is concerned with the environmental aspects of these technologies and presents information either as four.d in technical literature or as made available by companies, governmental agencies, and individuals expert in the field.