The Queensland premier has called for Adani to provide more details about its scaled-down Carmichael coal mine.
Annastacia Palaszczuk has expressed scepticism about the Indian miner's announcement that it will self-fund a much smaller version of the mine in Queensland's Galilee Basin.
She says Adani's new plans are very different from what it originally promised and will require new negotiations, telling ABC television: "We will believe it when we see it."
Mining giant Adani's announcement that it intends to go ahead with its controversial Queensland mine has outraged environmentalists.
The Climate Council says the decision poses a "grave risk" to Australia.
Adani announced on Thursday it will fund the entire cost of its Carmichael mine in the state's Galilee Basin.
The announcement in Mackay comes after Adani last month said it was scaling back the size and scope of the project, from a 60 million tonnes a year, $16.5 billion mega-mine, to a more manageable 10 to 15 million tonnes a year costing around $2 billion.
The project has been fiercely opposed by environmental groups who argue the thermal coal that will be extracted from the mine will contribute to global warming.
Climate Council chief executive Amanda McKenzie questioned the announcement when large parts of Queensland were burning and gripped by drought.
"Adani has put the ball firmly in the court of the major political parties. Do they support a coalmine that is fundamentally at odds with protecting Australia from the worst impacts of climate change," she said.
The project has struggled to attract financial backers but now Adani Mining chief executive Lucas Dow says they will move forward alone.
Adani could also open the entire Galilee Basin to exploration, with mine projects from GVK/Hancock and the China Stone already given preliminary approva
