Vehicle-based solutions, such as new vehicle designs and new, cleaner fuels. Urban solutions, including more support for public transportation. In fact, the Transportation Table studied over 30 different strategies to improve the efficiency of urban transportation in Canada. As I said, these solutions are targeted specifically at the greenhouse gas issue, but they will have an impact on the ground level ozone as well. We require collaboration and cooperation, which is why we've gathered here today.
Some issues transcend national boundaries.
I don't mean simply the way in which smog can blow in from south of the border, although that is a big problem. I also mean that we need international agreement on standards that affect production of smog and greenhouse gases. First of all, let's acknowledge that aircraft engines are relatively efficient. But the air sector does have an impact on the environment, and Canada is working with the International Civil Aviation Organization to find ways to decrease it. Transport Canada helped develop a Special Report for the ICAO on Aviation and the Global Atmosphere.