U.S., Dec. 13 -- Rio Tinto is now offering independently certified, responsibly produced aluminium from its smelters in Australia and New Zealand that predominantly use hydro-powered electricity.

Aluminium Stewardship Initiative (ASI) has granted its Performance Standard and Chain of Custody certifications to Rio Tinto's Amrun and Weipa bauxite mines, Yarwun alumina refinery, and the Bell Bay and NZAS aluminium smelters.

This strengthens Rio Tinto's ability to offer ASI Aluminium throughout its global supply chain, building on the certifications in place for its Canadian operations.

ASI certification means customers can be assured that the aluminium they purchase has been produced to the highest environmental, social and governance sta...