In the context of greening armed forces' aircraft, ships, and other things, such as by using alternate fuels, etc., the member states provide the greatest influence as the providers of all the equipment that would consume fuel. There are other initiatives—for example, smart defence initiatives—that are looking at it.
We use NATO as a means to come together and establish best practices. There are, for example, standard NATO agreements, which are procedures that we use. Rather than each nation writing up their own procedure for improving exhaust for diesel engines, we do it together as NATO and then apply it to all our procurements. There are definitely some things like that in NATO.
The majority of the consumption and footprint is probably derived through the nations by virtue of equipment.