The Hidden Carbon Cost of War: Why Military Emissions Are the Elephant in the Climate Room
There’s a glaring omission in our global climate conversations, and it’s not a small one. While we meticulously track emissions from industries like agriculture, aviation, and manufacturing, one of the most carbon-intensive sectors operates largely in the shadows: the military. Personally, I find this oversight astonishing. Wars don’t just destroy lives and infrastructure; they wreak havoc on the climate. Yet, military emissions remain a blind spot in international climate agreements. Why? It’s a question that demands urgent attention.
The Unseen Carbon Footprint of Conflict
Let’s start with the numbers, because they’re staggering. Russia’s invasion of Ukraine, for instance, has generated an estimated 311 million tonnes of CO₂ equivalent—roughly the combined annual emissions of Belgium, New Zealand, Austria, and Portugal. To put it bluntly, that’s a climate catastrophe masquerading as a geopolitical crisis. What many people don’t realize is that the bulk of these emissions don’t come from direct combat. Instead, they’re tied to the destruction and subsequent reconstruction of infrastructure. Rebuilding what war tears down is, climatically speaking, the most destructive act of all.
Take the Israel-Gaza conflict, for example. Research shows that the first 15 months of the war generated over 33 million tonnes of CO₂ equivalent, with only a fraction coming from military operations like jets and artillery. The lion’s share? It’s from the projected emissions of rebuilding nearly 450,000 apartments, thousands of kilometers of roads, and essential systems like schools and hospitals. If you take a step back and think about it, war isn’t just a humanitarian crisis—it’s a slow-motion environmental disaster.
The Military Emissions Gap: A Structural Blind Spot
Here’s where things get particularly infuriating. Militaries and their supply chains are estimated to account for about 5.5% of global greenhouse gas emissions. That’s enough to make them the world’s fourth-largest emitter if they were a country. Yet, under the United Nations Framework Convention on Climate Change (UNFCCC), countries have been exempt from fully reporting military emissions since the 1990s. The U.S. successfully lobbied for this exclusion on national security grounds, and the 2015 Paris Agreement only introduced voluntary reporting. The result? A system that’s patchy, incomplete, or missing altogether.
What this really suggests is that we’ve allowed national security interests to trump planetary survival. The top military spenders—the U.S., China, and Russia—either submit no data or incomplete figures. This isn’t just a gap; it’s a gaping hole in our climate accountability framework. From my perspective, this is a moral and scientific failure. We can’t claim to be serious about climate action while ignoring one of its most significant drivers.
The Broader Implications: War as a Climate Accelerator
Wars don’t just emit carbon during active conflict. They create long-term environmental scars. In Ukraine, for instance, Russia’s attacks on electrical infrastructure released sulfur hexafluoride, a greenhouse gas 24,000 times more potent than CO₂. The rerouting of civilian aircraft around Ukrainian and Russian airspace added an estimated 20 million extra tonnes of CO₂ equivalent. These are not isolated incidents; they’re part of a pattern. Every conflict, from Gaza to Iran, adds to an unaccounted carbon liability that affects us all.
What makes this particularly fascinating—and alarming—is how it intersects with global priorities. The richest countries spend roughly 30 times more on their armed forces than they contribute to climate finance for developing nations. Global military spending hit a record $2.7 trillion in 2025, surpassing the $2.2 trillion invested in clean energy. This raises a deeper question: Are we prioritizing war over the planet’s survival? It certainly looks that way.
What Needs to Change: From Oversight to Accountability
The good news is that solutions exist. Civil society and academia have already developed methodologies to track military emissions. Organizations like the Conflict and Environment Observatory have shown that it’s possible to quantify the climate impact of war using open-source data. The science is there; what’s missing is the political will.
In my opinion, the UNFCCC must make reporting military emissions mandatory. The Intergovernmental Panel on Climate Change (IPCC) should include a dedicated report on conflict emissions in its next assessment cycle. And when countries launch wars of aggression, their emissions should be added to their carbon ledger. Russia’s invasion of Ukraine, for instance, created a climate debt on behalf of the entire planet. The same logic applies to other aggressors.
A Call to Action: Rethinking Priorities
As conflicts proliferate, so does our unaccounted carbon footprint. Every degree of warming we’re trying to avoid is undermined by wars. Accounting for conflict emissions isn’t just a technical fix; it’s a moral imperative. We can’t afford to treat military emissions as collateral damage in the fight against climate change.
Personally, I think this is a moment for radical reevaluation. If we’re serious about saving the planet, we need to stop funding war machines at the expense of climate action. It’s time to close the military emissions gap and hold nations accountable for the carbon cost of conflict. The question is: Do we have the courage to do it?
