I think the fundamental hurdle that has existed to date to adoption of a carbon tax has been the question of political acceptability. Certainly it's a tool that has all of the merits on effectiveness grounds, efficiency grounds, and can be designed to meet equity concerns. But in Canada and the United States in particular there has been a political aversion to the imposition or the creation of new taxes, which all of you are very familiar with based on the more recent experiences with the GST. And I think what's really interesting about this all-party committee on Bill C-30 is that you have an opportunity to make a collective recommendation that recognizes that a carbon tax is what the experts are saying is the best approach to moving forward. That way, no single political party can really be saddled with the public vitriol that may arise through the imposition of a carbon tax.
I also think it's absolutely fundamental to the public acceptance of a carbon tax that it be not a revenue-raising tax but a revenue-neutral tax.