The diagram shows the different stages in the production of lead. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates the process used to produce lead from raw ore. Overall, it is a linear, eight-stage procedure that begins with mining the ore and ends with casting the refined metal into blocks. Throughout the process, unwanted materials are gradually removed, and heat is applied at a later stage to extract pure lead. First, […]