Utilize the input text as a context reference, choose the right relationship between Alcoa and aluminium from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

The increase in primary aluminium production at the smelter to 420,000 tonnes per year could bite into markets also supplied by rival Alcoa (NYSE: AA - news ) and other producers struggling with softer revenue caused by weak prices and rising exports from China.

Answer: product_or_material_produced