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Photo: Supplied: Hardie Grant Books
For decades George Wilkenfeld was among those arguing for his country, Australia, to do more to reduce its greenhouse gas emissions.
The independent energy consultant helped develop the country's star-ratings for energy and water efficiency, as well as the National Greenhouse Gas Inventory.
He's co-authored a new book with climate researcher Clive Hamilton that argues the time for emissions reduction has passed, because the planet will continue to heat - even if targets are met. In their book, Living Hot: Surviving and Thriving on a Heating Planet, they challenge the viability of renewable energy solutions and strategies like electrification.
It's a frank assessment of the situation Australia - and the world - finds itself in.
But it also offers hope, breaking down the practical steps that should be taken now to help adapt to an environment changed by the climate.