I imagine a mix of solar and natural gas. A lot of natural gas is mined in Western Australia and Australian mines tend to be in hot sunny places. Coal mining isn’t BHPs business so that seems unlikely.
Uhhh, BHP is like one of the largest coal miners on the planet.
Though, it's just one of their operating units (mainly iron and copper).
The iron ore mines are nowhere near the coal mines, but are near the North West Shelf gas area.
Nah, I know, the iron is in WA, iirc the main coal mines are in Queensland and some in NSW. The main point was the comment that coal isn't BHP's business, when they've gotta be the largest coal miner in Australia.