Australia’s highest court ruled against expanding the Mount Pleasant coal mine in New South Wales, stating that the approval process failed to minimize greenhouse gas emissions as required by law. The case was brought by environmental activists Wendy Wales and Tony Lonergan who argued that mining operations contribute significantly to climate change impacts. Three judges out of five agreed with the plaintiffs, halting the proposed expansion which would have extended the mine’s operation until 2048 and nearly doubled its annual output. This decision sets a national precedent requiring consideration of climate damage in fossil fuel project approvals.
Written locally by qwen2.5:14b on 2026-10-07,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
Story summary
In a landmark decision on June 7, the Australian High Court ruled against the expansion of MACH Energy's Mount Pleasant coal mine in New South Wales. The court’s judgment, supported by three out of five judges, found that planning authorities must consider the local climate impacts caused by greenhouse gas emissions from exported coal. This decision reverses a previous approval granted to expand the mine, which would have doubled its coal output to 21 million tonnes per annum until 2048, with 98% of projected emissions classified as Scope 3 emissions.
The case was initiated by the Denman Aberdeen Muswellbrook Scone Healthy Environment Group (DAMSHEG), led by Wendy Wales, a retired science teacher. The ruling is expected to have national implications, setting a precedent that fossil fuel project approvals must take into account global emissions and local climate change impacts.
Written for “High Court Rules Against Coal Mine Ex…” on 2026-10-07,
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Australia’s highest court has ruled against the expansion of a major coal mine, finding that planning authorities had failed to ensure that emissions of planet-warming greenhouse gases would be “minimised to the greatest extent practicable”.
asserted
emissions → rule → extent
Environmental campaigners called Wednesday’s court decision the first climate case to reach the country’s highest court.
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campaigners → call → court
They said it set a “binding national precedent” requiring climate damage be weighed when fossil fuel projects are considered.
asserted
projects → say → precedent
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asserted
profits → hit → war
In the ruling, three of the High Court’s five judges found that the expansion of the Mount Pleasant mine in New South Wales must be halted.
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expansion → find → Wales
Planning authorities, they said, were obliged to consider granting consent only with conditions ensuring that all greenhouse gas emissions were minimised, and had not done so in this case.
asserted
emissions → say → case
The case was brought by retired science teachers Wendy Wales and Tony Lonergan, who had fought for years to halt the planned mine expansion in Australia’s rural coal-digging heartland.
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who → bring → heartland
“Today the High Court has said what we have always known,” Wales said in a statement.
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Wales → say → statement
“We cannot dig up coal, ship it overseas, watch it drive climate change, and then pretend the consequences have nothing to do with us and won’t be felt by us.”
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consequences → dig → us
The mine’s operator, Mach Energy, had sought to extend the life of the open-cut mine in the Hunter Valley by more than 20 years, to 2048, and to nearly double its annual output.
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operator → seek → output
Mach is owned by Droxford International, a subsidiary of Indonesia’s Salim Group.
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Mach → own → Group
Mach argued that coal exported and burned overseas could not be clearly linked to environmental effects felt near the mine.
uncertain
coal → argue → mine
The company’s proposal was initially approved by the New South Wales Independent Planning Commission.
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proposal → approve → Commission
But environmental campaigners disagreed, saying every ounce of greenhouse gas released into the atmosphere made bushfires, floods and drought more likely.
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bushfires → disagree → atmosphere
“Today, the highest court in the country agreed that those decisions have to account for the damage they cause,” said Lonergan.
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Lonergan → agree → damage
But it is the end of coal mine approvals that look the other way on climate.”
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that → look → climate
Australia is one of the world’s largest fossil fuel exporters, ranking among the top sellers of both coal and liquefied natural gas.
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Australia → rank → coal
Anita O’Hart, a lawyer for Wales and Lonergan’s community group, said the “historic” ruling was expected to affect how future fossil fuel projects are handled.
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projects → say → Wales
“The High Court has confirmed that planning authorities cannot ignore the chain of causation from a project’s emissions through to real, local climate harm,” she said.
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she → confirm → harm
“This ruling will be applied by courts and planning authorities across Australia, and it will be studied internationally as one of the most significant domestic climate law decisions in the world.”
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it → apply → world
Mach Energy said it was “disappointed with the outcome” but accepted the court’s decision.
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it → say → decision
“We will continue to actively pursue all available options to ensure the long-term continuity of the Mount Pleasant operation,” the company said in a statement.
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company → continue → statement
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