If you examine the data with respect to emission reductions, the data concerning our fuel consumption, which is the fundamental element in our industry, shows that we're hitting diminishing returns in relation to the investments. We are different from other sectors because of the importance of fuel as a variable cost in our operations. Reducing fuel consumption is a matter of economic survival, and in Canada all the more so because we operate in an inhospitable public environment.
I'm going to ask my colleague to jump in here to illustrate the lengths to which Canadian airlines go to reduce fuel consumption, to manage every last litre of fuel in a flight. That's our reality. Adding a cost at the margin—