There are specifications that would be met in the Canadian surface combatant project, and all of our ships, pertaining to the fuels that are required in those ships. Typically those specifications and the details of them are more the purview of our materiel group, because they get into very specific types of fuel items, such as flashpoint and viscosity. While I can't speak to the specifics, I know there's always work done to specify the proper fuel.
Basically, if there is a fuel that can be used in those ships that would be greener than the fuel today, then I have no doubt that those ships would be designed to accommodate that type of fuel. I'm just not aware of the specifics of whether we're pursuing a certain type of greener fuel.