In August, BHP Group Ltd. said it would combine its oil-and-gas business with Australia's Woodside Petroleum Ltd. in an all-stock deal, adding that it would end its dual listing in London. BHP on Tuesday also approved a $5.7 billion project to mine potash in Canada, as it adjusts to the prospect of a lower-carbon world, where old profit drivers such as petroleum and thermal coal are less appealing.

So, What is the strategic rationale for combining BHP's oil and gas business with Woodside? Why do you think BHP has decided to end its dual-listing in London? What were other important aspects of BHP's recent annual earnings announcement? Please discuss.