Mr. James Cogan:

There are a number of options for aircraft fuel. The challenge with aircraft fuel is that it is not taxed. It is very cheap for airline operators and there is little incentive for them to swap to anything at all. There are different crops that could be more efficient for producing specific types of fuels. The only caveat I would raise is that one would have a very vulnerable chain if one were to create a little walled garden market going from the farmer who learns how to plant, grow and cultivate a new crop to a firm that processes it to a company that buys it and puts it in its aircraft. One broken link and the rest of it falls down. One part of the chain is the legislation around it. It is preferable to stick with the ones we know and to stick to crop types that can be expanded or contracted in an elastic way depending on a number of other things in order that they are not entirely dependent on one processor who is dependent on one regulation and one customer who is prepared to pay more for ten years while the rest of it gets off the ground. Therefore, the answer is "yes, but".