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SunCable, the mega renewable energy project backed by billionaire Mike Cannon-Brookes, has secured in-principle environmental approval from the NT Government and NT Environment Protection Authority for its flagship Australia-Asia Power Link project.

Meanwhile, Rio Tinto has given the go-ahead to inject its $6.2bn share into the $US11.6bn giant Simandou iron ore project in Guinea, saying final government approvals from both China and the African nation had been granted. Rio owns a 53 per cent share, along with Chinalco.

And the end is nigh for Qenos' Altona factory in Melbourne's outer southwest. It's understood the company's last operating chemical manufacturing plant will close as early as September.