Australia's fossil fuel exporters have been put on notice of waning appetite for their product from some of their biggest customers in Asia as South Korea's adoption of a net-zero emissions target increased the share of markets committed to decarbonisation to over 70 per cent.

Between them, South Korea, Japan and China – who now all are targeting net-zero emissions by 2050 or 2060 – accounted for $75.6 billion of Australia's total $103 billion of exports of coal and gas last year.