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I want to ensure and the Government wants to ensure that Australia is well prepared to tackle dangerous climate change with a scheme which is both responsible and which meets our international commitments.

There's some politicians who still seriously believe that we haven't got global warming.

In the case of climate change, the threat is long-term and diffuse and requires broad international action for the benefit of people decades in the future. And in politics, the urgent always trumps the important, and that is what makes it a very difficult and challenging issue.

We can look back through ice-core data and see over 800,000 years, relationships between carbon dioxide and the temperature of the world. So those people who deny the importance of climate change are just wasting their time. They're also being diversionary because if we don't act the risks are enormous.

Well, Australians should speak for the national interests of Australia, and whatever role former Australian prime ministers may have, one of the things you do is speak frankly about the country as you see the country's best interests, you know?

The floods and fires and storms and droughts that Australia has suffered in the last few years have left no doubt in many Australians' minds about just how much is a stake in a super-heated world.

Politicians or pundits can distort or cherry-pick climate science any way they want to try and gain temporary influence with the public. But any serious industrialist who's facing 'climate exposure' - as it's now called by money managers - cannot afford to engage in that sort of self-delusion.

I think the Australian people are very conscientious. During the 1980s and 1990s we proved they will respond conscientiously to necessary reforms. They mightn't like them but they'll accept them. But reforms have to be presented in a digestible format.

Business leaders, social justice groups, farmers and ranchers, doctors and nurses and people from all walks of life are concerned about the climate threat.

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.