This chapter of the 2006 IPCC Guidelines for National Greenhouse Gas Inventories gives guidance for estimating greenhouse gas (GHG) emissions from the production of metals. Specifically, it covers emissions from the production of iron and steel and metallurgical coke, ferroalloy, aluminium, magnesium, lead and zinc. It asks for special care in the estimation to avoid double counting or omitting carbon dioxide (CO2) emissions from fuel combustion. It also highlights that CO2 capture and storage is not covered in this chapter.