There is not going to be, we can be quite certain, there's not going to be any action on reducing greenhouse gas emissions by China or India or Indonesia or Brazil unless all developed countries are making a major effort. It will still be a big job to get them in, even if we are all making the effort. But our making the effort is a necessary condition.

Economic development over the past two centuries has taken most of humanity from lives that were brutal, ignorant and short, to personal health and security, material comfort and knowledge that were unknown to the elites of the wealthiest and most powerful societies in earlier times.

The climate change problem is at its heart an ethical problem. It's a problem of income distribution and it's a problem of income distribution with dimensions that we don't usually think about very much.

It is a simple fact of life on earth that there is going to be no successful mitigation of the climate change problem without a truly global effort. All developing companies or all major developing countries have to be part of that and accept substantial constraints on greenhouse gas emissions.

A reduction in emissions matters more than what a country pays for it.

Carbon capture and storage, its commercial development.. is going to be the key to the future of coal. If it is successful commercially, then the Australian coal sector will be a center of prosperity and growth; if it's not successful then it won't be. I think in the long run it's as simple as that.

Every climate scientist has his or her own views on some issues that differ from the mainstream in detail. But the broad findings of the IPCC (Intergovernmental Panel on Climate Change) have general support amongst scientists with relevant specialist expertise. The broad wisdom of the IPCC is strongly contested by a small number, and a small minority, of reputed climate scientists. It is not contested by the large majority of specialists, and by the leaders of the relevant learned academies in the countries of great scientific accomplishment.