Australia's High Court Rules Climate Impact of Exported Coal Must Be Considered in Mine Approvals
A landmark ruling requires planning authorities to assess the downstream emissions from burning exported coal, impacting the mining industry and environmental litigation.
Australia's High Court has delivered a split 3-2 ruling that compels planning authorities to consider the climate impacts of downstream emissions, including pollution from burning exported coal, when reviewing mining projects. The decision on Wednesday favored environmentalists who challenged an expansion of the Mount Pleasant coal mine near Muswellbrook in the Hunter region of New South Wales.
MACH Energy, owned by an Indonesian conglomerate, had sought to extend the Mount Pleasant mine's life by 22 years and nearly double its yearly output. Justice James Edelman noted in his reasons that the project, if approved, would be among the world's largest greenhouse gas emitters. The ruling upholds a previous decision by the state appeals court, which found that planning authorities must account for the pollution generated when the mined coal is eventually burned overseas.
Climate Change Minister Chris Bowen stated that the government "respected" the decision while attending an international climate change meeting in Fiji. However, opposition figures Angus Taylor and Matt Canavan called the ruling a "threat to Australia's standing as a reliable energy exporter."
Tania Constable, chief executive of the Minerals Council, expressed concern over the judgment's wider implications, suggesting that "mines may have to work out how to reduce emissions from their export customers." The council urged the New South Wales government to further safeguard planning approvals for mining projects.
Environment Minister Murray Watt clarified that this "novel decision" does not automatically affect federal environmental approvals, as it pertains to a New South Wales government decision based on state legislation. He noted this was the first time the High Court had made such a finding. The opposition has called for state and federal governments to intervene to ensure clarity for trading partners regarding Australia's role as a coal exporter.
Despite the ruling, New South Wales Natural Resources Minister Courtney Houssos sought to allay fears, stating that the decision "does not mean the expansion cannot be reconsidered or that coal mine extensions cannot be approved."
The legal challenge was led by Muswellbrook landowner Wendy Wales, a retired science teacher who described the decision as a victory for local communities. She highlighted the increasing encroachment of mines on the town, bearing the burden of environmental changes.
A spokesperson for MACH Energy noted that the mine's workers had experienced prolonged fear and uncertainty. Lawyers involved in the case anticipate the decision will be significant for climate litigation globally.
The state planning commission initially approved the Mount Pleasant mine expansion in 2022, but local residents launched a legal challenge. After an initial setback, the New South Wales' highest court ruled the approval unlawful in 2025, emphasizing the requirement to consider Scope 3 emissions – those generated when coal is burned. The appeal court suggested potential conditions such as refining coal before export, restricting exports to Paris Agreement signatories, or requiring Scope 3 emissions offsets.
MACH Energy then took the case to the High Court. As an interim measure, New South Wales permitted the mine, which employs approximately 500 full-time equivalent jobs, to operate until 2032 with a slight increase in yearly production. The 22-year expansion proposal is now set to return to the New South Wales Land and Environment Court for further consideration.