Net zero makes sense from a defence point of view, but the military has historically blocked climate action over operational concerns. Beyond the climate action apathy that is felt across society, a major reason why the military has not always seen net zero as a priority is that militaries risk their capabilities by adopting new equipment that may prove ineffective.

“The operational requirements of the military […]  mean that if you want to introduce a new fuel or technology you have to be absolutely certain that it works,” explains Björn Nykvist.

“You only need look at the logistical problems faced by Russian soldiers in their invasion of Ukraine to see how important it is to get this right.” These problems included fuel and supply shortages, a lack of convoy protection and a scattered command structure.

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