He didn't have a plan behind it. I would urge you again to provide that plan.
Secondly, there are two components on airlines. One is internal, where we're talking about a price on pollution. There is also the international component, which is done through ICAO. Canada has taken a significant lead there, because international travel is not under the Canadian budget for greenhouse gases.
Canada has taken the lead there because 2% of greenhouse gases on the planet come from international air travel. I'm very proud of the role Canada has taken there, with sign-on by other nations to take a responsibility for the production of greenhouse gases.