Alcoa chief executive Bill Oplinger told Wall Street the US aluminium specialist could take strong action to boost profits from alumina, most of which it refines in Western Australia.
South West WA's power grid reached a record 91 per cent peak renewable energy share in December - driven by 1,225 MW of new battery storage - while wholesale power prices fell 13 per cent and carbon emissions dropped 15 per cent as coal and gas generation declined.
The green light for Black Mountain Energy comes just months after Federal experts said its environmental risk assessment was "limited and disjointed" and reached "largely unsupported" conclusions.
The giant $50B Asian Renewable Energy Hub proposed for WA's Pilbara has upsized and switched from providing power to make green ammonia, in Australia's most ambitious hydrogen play.
Woodside has invested in two existing green hydrogen projects chasing Federal funds as it battles changing markets and community concern about climate change.
Green steel made with renewable hydrogen could produce 25,000 Australian jobs but the Pilbara's iron ore would be shipped east to avoid high labour costs.
