Militaries are major global polluters, yet they remain exempt from climate reporting, creating a blind spot that threatens the entire COP30 roadmap. As COP30 negotiations in Belem enter their final stretch, there is hope that countries might finally agree on a roadmap to phase out fossil fuels a breakthrough that is crucial if we are serious about keeping 1.5C alive. Yet even at this pivotal moment, one major highway is still missing from that roadmap that could undermine the progress made in Brazil: the carbon emissions of the military.
Now a review of 11 recent academic studies by Scientists for Global Responsibility has found that each additional $100bn of military spending leads to an estimated 32m tonnes of carbon dioxide equivalent (tCO2e) being dumped into the atmosphere. The emissions come from direct sources such as fuel-guzzling combat planes, warships and armored vehicles, as well as indirect emissions from transporting equipment, complex global supply-chains, and the effects of war fighting itself.