I have said consistently in my 16-and-a-half years in the parliament, I have always supported the party room's decision and the party room is the ultimate authority on these matters. I don't expect that to change.

If the question is do people (in the Liberal Party) believe that human beings are the main cause of the planet warming, then I'd say a majority don't accept that position.

I am not at all convinced that human emissions of CO2 are adding to global warming.... I remain to be convinced about the theory of anthropogenic global warming.

I am quite surprised and rather disappointed by the loneliness, isolation and indeed demonisation the sadly misunder­stood CO2 is experiencing. Thus, upon leaving the parliament, I am contemplating the foundation of an organisation called 'The Friends of Carbon Dioxide'. Membership will of course be open to all, including the plants whose very existence depends on CO2. I think this organisation's slogan, 'CO2 is not pollution', self-selects. It has both accuracy and melody to commend it.

Making the documentary was an extraordinary experience and it really hit home to me the quasi-religious nature of this anthropogenic global warming cause. These people really have found religion.

It presents a really compelling case against the whole theory of anthropogenic global warming. From my point of view, it is a theory that has completely corrupted public policy making in most of the developed world. It confronts all the dubious claims that the warmists have put out there.

I must say that when I first learned of the existence of the Australian Greenhouse Office, I assumed it was responsible for supplying tomatoes to the Parliament House kitchen. But, no, as I soon learnt as industry minister, it was in fact a government funded redoubt of veritable soldiers in a war against carbon dioxide. The zealotry and obsessive passion of these warriors in the battle against the apparent evils of carbon dioxide remains a curiosity to me. After fighting these people for three years as industry minister, I really did wish they would just go away and grow tomatoes.