I thank my good friend the Minister for allowing me to intervene. Ever since I was a boy, I have always been extremely concerned about jet fuel being injected directly into the upper atmosphere. I was told when I was young that it was clean. Of course it is not. One of the really big problems we have internationally is that jets go across our skies—some of them are not ours, obviously—and we cannot electrify a jet engine. It would be wonderful if someone could come up with a way of making an electric jet engine, so that we do not spew out exhaust into the upper atmosphere, which must have a direct effect on our climate.