Should we be investing in solar, wind, hydrogen or nuclear power?
Carbon offsets or carbon credits?
And how much mining will be required to deliver the inputs to a transition to green energy?
Alan Finkel was former Australian Chief Scientist from 2016 to 2020. He led the review of Australia's electricity market, the development of the national hydrogen strategy and the national low-emissions technology road map.
He has been an adviser to industry and governments on both sides of politics across the Tasman.
Now he has released his blueprint for the clean energy transition in a new book, called Powering Up: Unleashing the Clean Energy Supply Chain.