Each time world leaders gather under banners like the Paris Agreement or stage a grand climate summit such as COP28, the headlines almost always cover up renewable energy targets, agricultural reforms, or the future of electric cars. We hear about the carbon footprints of aviation and shipping, and about how industries and households must cut back. But here’s a kick – one of the world’s biggest polluters isn’t even in the room. The military, with its jets, tanks, and sprawling overseas bases, burns through so much fuel that its carbon footprint challenges entire countries. Yet it rarely appears in official climate pledges, if at all. And so, while the conversation on military emissions and climate change sounds urgent and sweeping, it’s missing a giant piece of the puzzle.

The Silent Polluter That Nobody Talks About

When talking about climate change in the news, we mostly hear only about smokestacks, coal plants, cars, and sometimes airlines. What barely grabs the attention is the military, even though it burns through unimaginable amounts of fuel every single day. The Pentagon alone consumes more oil than some medium-sized countries, and studies from Scientists for Global Responsibility document that armed forces worldwide produce about 2,750 million tonnes of CO2 each year. To put that into perspective, it’s a share bigger than both civil aviation and shipping combined.

The big question is, why isn’t this widely reported? And the one big reason is the way international agreements are written. When the Paris Agreement was signed, countries were given several options to skip, such as reporting military emissions or claiming national security concerns. After all, revealing how much fuel a fleet of fighter jets burns could hint at strategic capabilities. That voluntary loophole, merged with the influence of the defense industry, means militaries have shielded themselves from the climate accountability that industries and households face every single day.

What makes this silence so loud is the scale of consumption. A single F-35 fighter jet can swallow down over 5,000 liters of fuel per hour. Large naval destroyers can burn 1,000 barrels of oil a day when situated. Multiply that across fleets, bases, tanks, and global operations working nonstop, and the numbers start to dwarf the whole national footprint. Ignoring such a vital polluter leaves the whole debate on military emissions and climate change incomplete – like trying to solve a puzzle while hiding one of its largest pieces.

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What are the Contributions of Military Activities to Emissions?

The direct and simple answer is that nearly everything the armed forces do comes with a heavy carbon price tag. No matter whether it’s preparing for war, moving troops across the globe, or simply maintaining sprawling bases, the climate cost is enormous. This is why leaving military emissions and climate change out of the global conversation creates such a twisted picture.

• Flying missions, whether training exercises or combat deployments, make up the lion’s share of emissions. The U.S. Department of Defense has addressed that aviation alone accounts for nearly 80% of its operational footprint.
• Naval operations utilize staggering amounts of fuel, with aircraft carriers and destroyers burning thousands of barrels of oil daily while patrolling oceans.
• Tanks, protective vehicles, and troop carriers run on diesel, burning through hundreds of liters even during a short plan.
• Bases and installations, from the Pentagon to overseas territories, need a regular supply of electricity, heating, and cooling, which adds to the total.
• Wars themselves drive emissions, not just through conflict but through the destruction and rebuilding that follow. The war in Ukraine has already released more than 150 million tonnes of CO2 when reconstruction needs are factored in.

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Why are Military Emissions Barely Reported?

The simple and clear truth is that these emissions stay unseen because governments want them that way, not like power plants or airlines, which are monitored and regulated; the military carries on behind a wall of secrecy. Climate agreements have given countries enough room to avoid reporting, and they’ve taken full advantage of it.

• The Paris Agreement didn’t push nations to disclose military emissions – it made it optional. So while industries submit their detailed carbon accounts, armies are free to skip the paperwork.
• National security is the most common defense. Officials argue that if the world knew how much fuel fighter jets or naval fleets gulped, it might disclose military strength. That claim has allowed defense ministries to sidestep transparency for decades.
• Money also plays a crucial part. The U.S. Department of Defense spends around $10 billion every year on fuel, and it directly benefits the oil industry. Neither side is rushing to highlight the environmental costs of that relationship.
• Active wars make the picture even darker. In Ukraine, let’s say, bombings, fires, and reconstruction needs have already added more than 150 million tonnes of CO2, according to Scientific American, but there’s no official system that exists to track such damage.
• When all is said and done, there’s a lack of political will. The global arms industry is worth over $600 billion, as SIPRI reports, and forcing militaries into climate accountability would challenge strong interests that prefer to keep the spotlight elsewhere.

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The Climate Fight Cannot Afford to Overlook the Military

Leaving the armed forces out of climate accounting develops one of the biggest blind spots in global policy. Reports highlight that cutting emissions from cars, factories, and power plants, but the military’s vital fuel use remains largely unseen. According to Scientists for Global Responsibility, militaries worldwide release about 5.5% of total greenhouse gases, more than most nations generate on their own. Ignoring that scale makes every climate plan look stronger on paper than it really is in practice.

The denials become obvious when budgets are compared. While governments highlight new pledges for renewable energy, they continue to include far greater sums into defense. For example, the United States approved over $800 billion in military spending for 2023, much of which was connected to operations that burn through fossil fuels. It is a global paradox – leaders at summits call for urgent climate action, even as they quietly sustain one of the world’s biggest emitters.

This silence also destroys trust. Citizens are urged to cut back on car trips, switch to efficient appliances, and pay higher bills for green power, while the largest institutional oil consumer – the military– avoids inspection altogether. Unless and until military emissions and climate change are addressed side by side, international agreements risk being seen less as solutions and more as half measures. Real progress only needs putting every polluter, no matter how powerful, on the record.

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Frequently Asked Questions (FAQs)

Q1. Why are military emissions often left out of climate agreements?

Military emissions are often excluded because governments argue that unveiling fuel use or operational data could expose national security details. Agreements like the Paris Agreement made reporting voluntary, which allowed countries to avoid accountability. This is why discussions on military emissions and climate change often remain incomplete.

Q2. How big is the military’s carbon footprint as compared to the other sectors?

The numbers are impressive. Research from Scientists for Global Responsibility displays that armed forces worldwide contribute about 5.5% of global emissions, a larger share than both civil aviation and shipping altogether. Ignoring this footprint means climate strategies underestimate the scale of the challenge.

Q3. Can militaries realistically decrease their emissions without harming security?

Yes, but it requires political will. Many militaries are experimenting with biofuels, renewable-powered bases, and efficiency upgrades. However, the changes remain small as compared to the scale of operations. Addressing military emissions and climate change together means holding defense institutions to the same standards of accountability as every other sector, without compromising core security needs.

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