There is some biofuel research being done in Canada, because some of the plants that will be used for that will grow here. I completely forget the names of them, but they're mustard-like plants. You sort of take the seeds—Camelina and Brassica, I think—that can be used for that. There's research being done in Canada. Actually, some Porter flights, I believe, use fuel that was produced from Canadian-grown plants. You also have algae that can be used, so the idea of biofuels is certainly with us.
The cost would be huge, but it's planning to sort of get over.... The idea is not to produce 100% of the fuel needed for aircraft using plants. The idea is to gradually increase the percentage. It's quite likely that some government money will be required somewhere, either in Canada or the U.S., if not somewhere else, in order to get these things under way. Then you also have synthetic fuels, which are not biological in nature, that can be used, anything from fuel made from coal, natural gas, or methane. There's a variety of hydrocarbons that can be used for that.