Mr. Pascoe, maybe you could answer this. A number of people have commented to me that when they are looking for a new car, for example, they can buy a traditional gas car or they can go with diesel or they can go with natural gas or a hybrid. The deals on the hybrid or the diesel or natural gas aren't as good, and the costs tend to be higher. There is an offset in terms of what they would save on energy, but they pay more up front.
Could you comment on the cost prohibitiveness of that?