The One Emitter
the Paris Agreement
Forgot to Name

The Paris Agreement runs to 27 pages. The Kyoto Protocol to 21. The UNFCCC framework spans three decades of negotiation, 198 signatories, and annual summits attended by heads of state. Nowhere in this architecture - not in a single binding clause, reporting obligation, or emissions target - is there a named commitment covering the world's third-largest source of greenhouse gases. That source is war. More precisely: it is the combined military apparatus of every nation on earth.

If the world's militaries were a single country, they would rank as the third-largest greenhouse gas emitter on earth - ahead of India, ahead of Russia - emitting an estimated 2,750 million tonnes of CO₂ equivalent every year. They would be invited to every COP. They would have binding targets. They would face scrutiny. Instead, by deliberate diplomatic design, they have none of these things.

This is not primarily a story about wartime emissions. Two-thirds of military emissions occur during peacetime - in training exercises, base operations, logistics networks, and procurement supply chains. The US military alone consumes roughly 269,000 barrels of oil per day, making it the world's single largest institutional consumer of hydrocarbons. It emits more CO₂ annually than entire industrialised nations such as Denmark, Portugal, and Sweden.

The accounting gap is not an accident. In 1997, the United States government - led by the Department of Defense, with congressional support including from then-Senator Joe Biden and Senator John Kerry - successfully lobbied for military emissions to be entirely exempted from the Kyoto Protocol's reporting requirements. The world's single largest institutional polluter negotiated itself off the books in the very treaty designed to hold the world accountable. That is not a footnote. It is the headline.

The Paris Agreement nominally closed this loophole, replacing mandatory exemptions with voluntary disclosure. The result is arguably worse: militaries can report what they choose, when they choose, using methodologies they define. CEOBS' 2025 analysis of UNFCCC submissions found the US - the world's largest military spender at $916 billion in 2023 - submitted no emissions inventory report whatsoever for the 2025 cycle. Russia's reported military emissions showed an implausible 63% drop during its full-scale invasion of Ukraine. Paris did not forget to name this emitter. It chose not to.

The consequence of this diplomatic silence is not merely academic. Global emissions totals are structurally understated. National NDCs are built on incomplete baselines. Net-zero targets are measured against counts that exclude one of humanity's largest emission sources. The world is trying to balance a climate budget with a missing line item the size of India's entire annual output - and every signatory to the Paris Agreement has agreed, implicitly, to keep it missing.

The relationship between war and fossil fuels is not incidental - it is structural. Modern militaries run on petroleum. Every sortie, every ship deployment, every tank offensive requires uninterrupted fuel supply chains. This creates a dependency loop that is, by design, self-reinforcing: the need to secure oil supply routes is itself a primary driver of military engagement, which requires more fuel, which creates more supply route insecurity, which demands more military presence.

The cycle operates across five reinforcing loops:

1. Infrastructure lock-in. Major powers maintain vast overseas military infrastructure to protect oil transit routes. The US operates over 800 bases globally, disproportionately concentrated in the Gulf, Central Asia, and East Africa.
2. Regime stabilisation. This military presence provides a security guarantee that keeps oil-producing regimes stable and supply flowing, regardless of their governance record.
3. Self-fuelling demand. The fuel required to maintain these bases and operations creates direct petroleum demand, enriching the very producers the military is supposedly securing.
4. Petro-aggression. Petrostates, insulated by oil revenues from domestic accountability, pursue more aggressive foreign policies. Belfer Center names this the "petro-aggression" effect: resource wealth enables risk-taking that accountable governments cannot afford.
5. Loop closure. This aggression triggers further military deployment, which requires more fuel, which deepens dependency. The cycle restarts.

The climate implication of this loop is precise: every oil-motivated military engagement increases aggregate fossil fuel consumption at both ends - by the military machine itself, and by sustaining the global infrastructure that makes oil the world's dominant energy currency. To decarbonise the global economy while maintaining the military apparatus built to secure fossil fuel supply chains is, structurally, a contradiction.

Wars are rarely paid for by those who start them. The United States has initiated or directly participated in military engagements producing an estimated 1.2 billion tonnes of greenhouse gas emissions across the post-9/11 period alone (Brown University Costs of War Project, 2023). The populations bearing the accumulated environmental cost of that figure are almost entirely outside American borders - in Iraq, Afghanistan, Yemen, Somalia, and Syria.

India bears 18% of total CBAM costs from Europe's carbon border mechanism - facing a carbon pricing bill rooted in decades of industrial development - while contributing minimally to the wars that have systematically deprioritised global climate finance. Bangladesh, with per-capita emissions a fraction of the US, faces existential sea-level risk by 2050. These are the nations paying the climate invoice for wars they did not commission.

The Gaza Case: Environmental Ecocide in Real Time. The urban conflict that escalated from October 2023 offers the world's most granular peer-reviewed data on the environmental cost of concentrated modern warfare. A study from Queen Mary University London estimated that the first 120 days of active operations produced between 420,265 and 652,552 tonnes of CO₂ equivalent, exceeding the annual emissions of 26 individual countries. But direct carbon is the most measurable, and least representative, dimension of what satellite and field data reveals.

The satellite data tells a precise story. A peer-reviewed study in ScienceDirect (2025), combining Sentinel-5P TROPOMI observations with SARIMAX and machine learning models, documented sharp and sustained increases in UV aerosol index and carbon monoxide from October 2023, linked directly to widespread combustion and infrastructure collapse. Methane levels rose steadily as waste management systems disintegrated. The data shows not a single pollution event, but a cascading environmental systems failure; one that does not respect borders. Contaminated groundwater, particulate dispersal, and untreated sewage flows into the Mediterranean affect regional ecosystems across Israel, Egypt, Jordan, and the wider Levant. The ecological damage is not contained within the conflict zone. It never is.

None of this appears in any NDC. None appears in any national climate risk register or ESG disclosure framework of any party to this conflict or any nation supplying material support to it. The environmental destruction of an urban ecosystem, measured in peer-reviewed journals, documented by satellite, verified by international agencies; yet invisible to the entire architecture of global climate accountability.

The most important climate data point that no climate report discusses is this: the country that has become the world's dominant clean energy investor has not initiated a foreign war in over four decades. China's last military initiation was a brief border conflict with Vietnam in 1979. Since then, it has deployed strategic patience and economic statecraft rather than kinetic force - and used the resulting fiscal and political stability to build the most ambitious clean energy infrastructure programme in human history.

The correlation is not coincidental. Countries that redirect defence spending into economic and technological development compound those advantages over time. Countries that export military force export capital, attention, and institutional focus - and import blowback, instability, and the fiscal weight of prolonged campaigns.

The numbers speak with uncomfortable clarity. China now accounts for 31% of all global clean energy investment - more than double any other economy. It has achieved its 2030 solar and wind capacity targets six years ahead of schedule. Its companies file 75% of all global clean energy patent applications. Its battery manufacturers hold 60% of global EV battery market share. In 2024, more wind turbines and solar panels were installed in China than in the rest of the world combined.

China is, simultaneously, still the world's largest coal user and largest emitter by volume - the transition is real but incomplete. The analytical point is not that China is a climate paragon. It is that the fiscal, institutional, and political capital not consumed by military adventurism has been redirectable - and has been redirected - into economic and technological infrastructure that is materially reshaping the global energy economy.

India's trajectory is more complex. Its climate performance is genuinely strong - CCPI ranks it 7th globally, it achieved its 51.5% non-fossil electricity milestone five years early, and its renewable deployment pipeline is one of the world's most ambitious. But India also has a $84 billion military budget growing at 6–8% annually, with zero military emissions reported to the UNFCCC. The investment case for India's clean energy sector is compelling. The geopolitical risk premium - from regional conflicts with Pakistan and China that intermittently reshape the security calculus - is a factor that climate investment models do not yet price.

The most strategically revealing dimension of war's climate cost is not what happens to combatants - it is what happens to the infrastructure of survival in nations that neither started nor can end the conflicts raging around them. Nowhere is this clearer than in the Gulf, where the UAE, Saudi Arabia, and Kuwait have built their modern existence on a foundation of desalinated water and oil infrastructure - and both are now in the direct line of fire.

The Middle East accounts for 46.9% of the world's total contracted desalination capacity (Nature, npj Clean Water, 2026). In the UAE, 42% of water supply comes from desalination. In Kuwait, 90%. In Saudi Arabia, 70%. These are not amenity systems - they are primary survival infrastructure in a region where freshwater aquifer depletion is accelerating and rainfall is negligible. A successful strike on a major desalination complex is, in hydrological terms, an act of civilisational disruption.

This infrastructure has already been targeted. In 2019, Houthi forces launched drone attacks that came within critical proximity of Saudi Arabia's Shuqaiq desalination plant on the Red Sea coast - a facility serving millions. In March 2022, a coordinated Houthi barrage struck the Shuqaiq plant directly, alongside an Aramco LNG facility in Yanbu and a petroleum distribution centre in Jeddah. The UAE has faced drone attacks on its territory from Houthi forces, and its $DP World-operated Red Sea port infrastructure has been impacted by shipping disruptions from Houthi maritime campaigns.

The environmental cascade from these attacks extends far beyond immediate damage. The Houthi campaign in the Red Sea has forced shipping rerouting around the Cape of Good Hope - adding approximately 3,000 nautical miles per voyage. A single container ship on the Shanghai–Hamburg route via the Cape emits 38% more CO₂ than via Suez (Frontiers in Political Science, December 2025). Asia-to-Mediterranean route emissions surged 63% in Q1 2024 versus Q4 2023 as rerouting accelerated.

The UAE presents the paradigmatic case of a nation at the intersection of climate vulnerability, energy transition ambition, and conflict proximity. It has launched Masdar - one of the world's largest state-owned renewable energy companies, with active projects across 40 countries. It hosted COP28 in 2023. Its Vision 2050 targets full decarbonisation. And yet: it sits in a region where its oil and water infrastructure are active military targets, where its Red Sea investments are under sustained attack, and where the carbon emissions of proximate conflicts - none of which it initiated - are accumulating in its atmosphere, its coastal waters, and its economic risk register.

Climate investment frameworks have developed sophisticated tools for pricing physical climate risk: sea-level projections, heat stress indices, water scarcity maps, transition risk assessments. They have not, as a class, developed comparable tools for pricing war-initiation risk as a climate variable. This is a structural gap in the analytical architecture of sustainable finance.

The argument for closing it is not ideological. It is financial. A nation's propensity to initiate or sustain military conflict directly affects: its fiscal capacity for climate investment; the stability of its regulatory environment for renewables; the security of the physical infrastructure underpinning clean energy transitions; the carbon intensity of its allied supply chains; and its credibility as a long-term climate partner for institutional investors.

The framework surfaces a counterintuitive insight for capital allocators: the most climate-credible sovereign investment environments may not be found in the G7. They may be found in countries that have chosen economic statecraft over military statecraft - that have used geopolitical stability as a platform for industrial compounding, rather than consuming it in foreign campaigns. The peace dividend is, in the 21st century, increasingly a climate dividend.

For institutional investors with climate mandates, the practical implication is specific: ESG sovereign risk assessments should incorporate a military-initiation risk premium. Countries with high war-initiation histories, volatile climate policy frameworks, and large military expenditures relative to clean energy investment represent a structural misallocation risk - not because of ethical concerns alone, but because the opportunity cost of that military spending is measurable in delayed transitions, abandoned NDCs, and undermined multilateral climate frameworks.