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Black Saturday reminded many Australians of what they know only too well: that of all the advanced economies, Australia is perhaps the one most vulnerable to climate change.

With nine degrees of warming, computer models project that Australia will look like a disaster movie. Habitats for most vertebrates will vanish. Water supply to the Murray-Darling Basin will fall by half, severely curtailing food production.

There is a reason why the cultures of Indigenous Australia inspire such fascination. And that is that they represent a unique way of thinking about the world. A vision that over tens of thousands of years has risen out of the land, the power, the very being of our continent, Australia.

I am not deeply involved in Australian politics but I know there are prime ministers, governments around the world who are not acting responsibly in relation to climate change.

With so much at risk, you might expect Australia to be at the forefront of the clean-energy revolution and the international effort to cut carbon pollution. After all, the continent's vast, empty deserts were practically designed for solar-power installations.

Australians don't have a preconceived notion of what things have to be... we can go on a fantastic journey.

The thing we often forget to talk about, or perhaps we take for granted, is our country's dazzling beauty. Our natural environment is so much a part of Australia's art, writing, music and culture, both indigenous and non indigenous.

But Australia faces additional regional and global challenges also crucial to our nation's future - climate change, questions of energy and food security, the rise of China and the rise of India. And we need a strong system of global and regional relationships and institutions to underpin stability.

What is likely to vanish - or be transformed beyond recognition - are many of the things we think of when we think of Australia: the barrier reef, the koalas, the sense of the country as a land of almost limitless natural resources.

Australia is the only island continent on the planet, which means that changes caused by planet-warming pollution - warmer seas, which can drive stronger storms, and more acidic oceans, which wreak havoc on the food chain - are even more deadly here.