A recorded disagreement between Nationals leader David Littleproud and former environment minister Sussan Ley arose over a Glencore-backed carbon storage proposal that Queensland subsequently rejected. Littleproud blamed Ley for the way an environmental screening decision had been handled; Ley denied personally approving the project. The distinction is important because the Commonwealth's decision about whether its own law was triggered was not the same as the state's decision about whether the project was environmentally acceptable.
The project at the centre of the row was proposed by Glencore subsidiary Carbon Transport and Storage Corporation, or CTSCo. Its plan involved injecting captured carbon dioxide into geological formations connected to the Great Artesian Basin, a major groundwater resource for farmers and regional communities. Concern about water quality and environmental risk prompted sustained opposition.
Littleproud was asked whether a federal determination made while the Coalition was in government had been the right call. He said it had not. He described a desktop review undertaken under Ley's ministerial responsibility and said she 'didn’t get it right'. His criticism put pressure on a colleague rather than directing all blame at the Labor government that subsequently handled the state assessment.
Ley offered a different account of how the decision was made. She said the suggestion she had personally approved the project was wrong. Her explanation was that the department had made a technical legal determination about whether national environmental legislation required a federal assessment. A determination that a project is not a controlled action is not the same as a positive environmental approval for construction or operation.
The Commonwealth had assessed whether the plan required further scrutiny under the Environment Protection and Biodiversity Conservation Act. Its response was that the proposal was not a 'controlled action' under that statute. That classification did not authorise injection into groundwater or remove Queensland's environmental assessment powers. Ley said the decision reflected the law's technical thresholds and was not a ministerial green light; Littleproud argued the federal process should have picked up the seriousness of the issue.
The CTSCo proposal was subject to scrutiny in Queensland, where regulators examined the potential effect of injecting carbon dioxide into an aquifer system. Farmers feared that the process could affect groundwater they depend on for agriculture and livestock. Glencore maintained that its scientific work supported the safety of the trial, but opponents questioned whether long-term risks were sufficiently understood.
The scale of the basin helps explain the intensity of the debate. It supports water access across large parts of inland Australia, including properties and communities where dependable groundwater is essential. A threat to an aquifer is not confined to one property owner's concern. Changes in water quality, pressure or availability can have broad consequences, which is why opponents sought careful testing rather than relying only on the developer's assurances.
The proposed project also sat within a wider debate about carbon capture and storage. Proponents regard the technology as an option for reducing emissions from industrial operations that are difficult to decarbonise by other means. Critics question its cost, performance, long-term storage security and whether it prolongs reliance on fossil-fuel activities. The merits of that technology generally are not identical to the suitability of a particular underground site.
Littleproud made that separation in his subsequent comments, saying carbon storage could have a place but must be undertaken where the science and approval process justified it. Farmers and environmental advocates had similarly argued that a project should be judged on the risk it posed to the basin rather than on support for, or opposition to, climate technology as an abstract concept.
Queensland ultimately rejected the CTSCo proposal. The state's environment department concluded that it was not suitable to proceed because of the potential effects on Great Artesian Basin groundwater. Its assessment found the relevant aquifer did not meet a confinement requirement and warned that injected carbon dioxide could migrate in ways that damaged water quality and environmental values over the long term.
That state decision changed the practical status of the proposal. The proposal was not awaiting its original Queensland approval decision, and the earlier Commonwealth screening determination did not override the state's refusal. Glencore acknowledged the rejection and criticised the decision, maintaining that the project had been damaged by misinformation and political opportunism.
The company argued that carbon storage offered industrial and climate benefits and defended the scientific basis of its work. Those statements are the developer's position. The regulator's findings remain a separate official conclusion about the site. An accurate account should present both without pretending that a commercial objection automatically reverses an environmental assessment.
The conflict between Littleproud and Ley also raised questions about collective responsibility under the former Coalition government. ABC reporting described consultation involving ministers and agencies before the federal advice was issued. Ley pointed to that process to challenge the implication that she alone had made a decision without others' knowledge. Littleproud, by contrast, focused on whether the process gave sufficient protection to the basin.
The Great Artesian Basin is more than a name on an environmental report. Farms, livestock operations and inland towns rely on its groundwater, so a proposal involving carbon dioxide injection engages questions about aquifer confinement, possible migration and the cost of damage that might be difficult to reverse. Queensland's regulator found the Precipice Sandstone aquifer was not sufficiently confined for the proposed activity, a specific technical reason rather than a general objection to industrial emissions reduction.
There is no basis here to suggest either politician was found to have broken the law. The record is of a political accusation, an explicit rebuttal and a later state regulatory decision rejecting the project. Those are different kinds of events and should remain separate.
The original Commonwealth referral and Queensland decision served different legal purposes. Federal officials considered whether national environmental-law triggers required a Commonwealth assessment. Queensland's regulator later examined the proposal under state environmental processes and identified a risk of lasting changes to groundwater quality. The earlier federal screening outcome did not amount to permission to operate the project, nor did it displace the state's subsequent decision to reject it.
Ley's defence was that the earlier Commonwealth advice had not advanced or approved the proposal. Littleproud's criticism was that the federal process had not subjected it to the scrutiny he thought it deserved. Both questions can be debated, but the dispute did not produce a finding that either politician acted unlawfully. The later environmental refusal demonstrated that the state had substantive grounds to stop the particular project.
The issue also divided interest groups that do not normally line up together. Farming organisations warned about risk to groundwater and agricultural production. Hancock Agriculture, associated with Gina Rinehart, opposed the proposal as a landholder with interests across the basin. Their opposition did not automatically prove that the company's scientific claims were false, but it showed that concern about the site extended across different economic and political interests.
CTSCo, the Glencore subsidiary behind the proposal, criticised Queensland's refusal and said its scientific studies had been assessed by independent specialists. The department reached a different conclusion about the receiving aquifer and possible contaminants, including increased salinity and metals. The regulator said carbon dioxide could migrate and produce long-term or irreversible changes if injection proceeded. Its decision addressed risk before approval; it did not report that the planned project had already contaminated local bores.
The case shows why carbon capture cannot be judged without asking where the carbon is intended to go. Industries seeking to cut emissions may consider capture and storage, but a promising technology does not make every geological formation suitable. The project's refusal does not constitute a finding that all carbon storage systems fail. It establishes that Queensland found this plan unacceptable in the specified Great Artesian Basin aquifer, with implications for protection of agricultural water.
Water-related decisions can have consequences well beyond the site named on an application. Farmers need confidence that a groundwater system will remain viable for livestock and other operations, and regional towns may have limited alternatives if water quality deteriorates. For operators deciding where to invest in bores, livestock and agricultural equipment, uncertainty about long-term water access may also affect business planning even when the disputed proposal does not proceed. The extent of any specific risk must be demonstrated by technical assessment, not guessed from general concern about underground injection. That is why the state's formal findings about confinement and possible migration are more informative than a slogan from either political camp.
Queensland's assessment was preventive. The decision did not establish that groundwater contamination had occurred at the proposed site; it identified unacceptable potential effects from the planned injection. Those concerns involved aquifer characteristics and water used for agriculture, irrigation and livestock. For communities relying on the Great Artesian Basin, that distinction matters: the proposal was rejected over the risk of future harm, not because the regulator had found that the project had already polluted their water.
The case leaves a practical lesson about environmental protection and government accountability. The real question is not simply which Coalition figure won the argument. It is whether citizens can see which decision-maker had which responsibility, what evidence each considered, and how the resulting system protects a water resource on which households, agriculture and regional economies depend.
