More money is likely to go down the drain as the Government ploughs ahead with the next stage of Otago's Lake Onslow project.
It's confirmed it will develop a detailed business case for the hydro storage set-up, despite the estimated cost of the project leaping to 16-billion dollars - a huge jump from the initial four-billion.
Manawa Energy Chairman Paul Ridley Smith says that there are so many smarter ways to decarbonise.
He says about 20 geothermal power plants could be built for 16-billion dollars and completely solve the problem.
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