Charles Hubbard at the Transport, Infrastructure and Communities Committee

I'm going to ask two more quick questions, if I have time.

One deals with the green movement. They claim that aircraft are one of the major polluters in terms of the upper atmosphere. We're in fact purchasing new C-17s.

For the new aircraft that are being developed, is there any assessment on the emissions that would be involved in the decision on which aircraft would be better, one from another, in terms of the companies and the engines they're using or in terms of the fuel they're using to generate lift and to provide flight?