From the Foreword by John Howard to What is Wrong With the IPCC? Proposals for a Radical Reform by Ross McKitrick:
I am an agnostic when it comes to global warming. That is why I had no difficulty in proposing in 2007, when I was Prime Minister of Australia, an emissions trading system, predicated on the rest of the world acting in a similar fashion, and designed to protect Australia’s trade-exposed industries.
Since then two events have intervened to reinforce the caution which should be exercised by my country in this area. The collapse of the Copenhagen Summit means that actions by major emitting nations is, to say the least, highly unlikely. Moreover, the global financial plunge has highlighted the folly of any nation taking action which harms its own comparative economic advantage.
Source: What is Wrong With the IPCC? (pdf)