Ideally we'd like the cost of fuel to be lower all the time. In this case, aviation has globally committed to some pretty aggressive goals: 2% improvement on fuel efficiency year over year up to 2020; from 2020 on, carbon neutral growth; and then by 2050 to reduce our emissions by 50% compared to 2005 levels. For us, biofuels represent a solution to the carbon-neutral growth perspective.
There's still a lot of work to be done on the sustainability of several of the crops. As we're seeing recently, industrial crop seeds such as camelina and mustard seed, specifically, can be grown in harsher conditions in Canada. Rotational crops don't compete with food. There have been very good, established sustainability criteria already in the provinces, in terms of the amount of water being used and so on.