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The country's first carbon capture and storage project raises hard questions - like whether it's over before it begins.
It is sold as a bold step into the future, a technological fix to one of the world's dirtiest problems.
But is New Zealand's climate solution, its first carbon capture and storage (CCS) project, over before it begins?
"Having read the submissions from the various companies on the government's regulatory plans, it just doesn't seem like it's going to happen in the next four and a half years before 2030," RNZ's climate correspondent Eloise Gibson tells The Detail.
"Maybe after that, but I can't see it happening at a scale that's going to take the pressure off, in terms of having to cut our emissions. It's going to be one of the things in the Swiss army knife, I hope, but we are not going to be putting it out in the next couple of years."
The CCS project - led by Todd Energy and backed by the government - aims to capture carbon dioxide from industrial processes and inject it deep underground in Taranaki, at the Kapuni gas field, locking it away for centuries.
The start date has been pencilled in for around 2027, and from then until 2030 it is expected to store a million tonnes of CO₂, with a further almost million tonnes stored over the following five years.
It is a big part of the government's broader plan to meet its legal obligations to cut emissions by 2030 - about a third of the carbon savings needed.
But Gibson tells The Detail the project's future is now uncertain unless Todd Energy gets "more money or less liability or a combination [of both]".
"There is a whole raft of things that have changed, one is the carbon price is low compared to other countries ... then there is the issue of the liability regime, so if there is a leak 15 years after you have filled up a field and closed it off, who is responsible for that ... so there is wrangling going on around the rules."
Globally, CCS has a mixed track record. Some projects, like Norway's Sleipner, have stored CO₂ safely for decades. Others have failed spectacularly, costing billions and storing less than promised.
New Zealand's unique geology - riddled with seismic faults - adds a layer of risk.
And if CO₂ does leak, it could undo years of emissions gains and pose unknown threats to groundwater and ecosystems.
Then there is the fear that CCS becomes a 'get-out-of-jail-free card' for polluters.
But putting that aside, if the project does not go ahead in New Zealand, what replaces it, so the government can meet its emissions targets?
"I approached the climate minister, and he did stress that the government takes an 'adaptive approach' with their emissions budget, which I guess means they can pivot if something doesn't pan out," Gibson says.
"But given they have cut a bunch of Labour-era policies that could have given them about a million tonnes of savings - which is what they need if this falls over - they are not likely to start these up again and there's absolutely nothing on the table that I have seen that would fill that gap, that this government would support, so it does give them a problem."
Ultimately, Gibson says she wants the government to use "everything in the toolbox".
"I don't think this is a time to be ruling out solutions. But it's also not a time to be distracted by expensive solutions, when we have other stuff that we know works, right there."
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