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[INTERNATIONAL] · Australia · 29 sources

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High Court of Australia blocks Mount Pleasant coal mine expansion

The High Court of Australia has issued a landmark ruling in its first-ever climate change case, overturning the approval for the expansion of the Mount Pleasant coal mine in New South Wales. In a split 3-2 decision, the court found that the Independent Planning Commission failed its legal obligation to consider how the project’s downstream emissions—specifically Scope 3 emissions from coal exported and burned overseas—would impact the local region through increased risks of bushfires, droughts, flooding, and extreme heat.

MACH Energy had sought to extend the mine’s operations until 2048 and nearly double its annual output. The ruling establishes a binding national precedent within the NSW planning system, requiring decision-makers to account for the local climate consequences of a project’s total emissions. This decision is expected to impact approximately 17 coal proposals currently in the NSW planning pipeline and provides a legal template for future climate litigation across Australia.

The case was brought by the Denman Aberdeen Muswellbrook Scone Healthy Environment Group (DAMS HEG), led by retired science teacher Wendy Wales. While industry groups have expressed concern regarding sovereign risk and economic uncertainty for the resources sector, environmental advocates view the decision as a critical victory for community-led climate action.

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Denman Aberdeen Muswellbrook Scone Healthy Environment Group · High Court of Australia · MACH Energy · Mount Pleasant coal mine · Tony Lonergan · Wendy Wales

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