a) One environmental hazard associated with the extraction of zinc metal is the release of sulfur dioxide gas ($\text{SO}_2$) into the atmosphere during the roasting of zinc sulfide ores. This gas contributes to acid rain. b) A galvanizing plant can be set up near a zinc extraction plant. This is because zinc metal is used to galvanize steel, which means coating steel with a layer of zinc to prevent corrosion. Setting up the plant nearby reduces transportation costs for the raw material (zinc) and ensures a ready supply. c) Properties of aluminium and its alloys that make them suitable for use in manufacturing include: • Low density (lightweight), making it useful for aircraft and vehicles. • Good corrosion resistance due to the formation of a protective oxide layer. • High strength-to-weight ratio when alloyed. • Good electrical and thermal conductivity. • Malleability and ductility, allowing it to be easily shaped into various forms. That's 2 down. 3 left today — send the next one.