There's been another major cost blow out to the Snowy Hydro scheme 2.0, first announced by Malcolm Turnbull in 2017. It commenced in 2019 and was forecast to take 5 years to complete. It started with a two-billion-dollar price tag — that climbed to twelve billion — and now that figure has been overrun. More funding is needed to see it through to completion in 2028.

• Guest: Alison Reeve, energy and climate change program director at the Grattan Institute