The humanitarian cost of war has always been the most visible and heartbreaking consequence of conflict. Cities destroyed, families displaced, and countless lives lost or permanently scarred. No economic recovery, political settlement, or diplomatic agreement can truly replace a human life lost in war. Yet beyond this tragic and irreversible human suffering lies another cost that rarely receives the attention it deserves. This cost is environmental degradation. In every war, the environment often becomes a silent casualty. The pollution created by conflict may not always appear in headlines, but its consequences can persist for generations, as modern warfare is not merely a clash of armies. It is an explosion of chemicals, metals, fuels, and toxins released into the air, soil, and water. Missiles, drones, artillery shells, and aerial bombardments leave behind more than physical destruction. Each explosion releases heavy metals, toxic gases, and particulate matter that contaminate ecosystems and threaten human health. Studies show that explosives used in warfare release substances such as lead, mercury, hydrogen cyanide, and other toxic compounds that spread through air and groundwater, affecting both wildlife and human populations.
Environmental damage caused by conflict has been a recurring feature of wars throughout history, but the scale has dramatically increased with technological advancement. Modern militaries operate massive fleets of aircraft, tanks, naval vessels, and missile systems, all of which consume enormous quantities of fossil fuels. Researchers estimate that the global military sector alone accounts for approximately 5.5% of total GHG emissions worldwide. This figure does not even include the emissions produced during actual combat operations, bombings, or the reconstruction of destroyed infrastructure. Explosive weapons are particularly damaging to ecosystems. When missiles or bombs detonate, they generate heat and shock waves that destroy vegetation, ignite forest fires, and contaminate soil with chemical residues. These residues may remain in the environment for decades. Land mines and unexploded ordnance also create long-term environmental hazards. Toxic materials from explosives can seep into soil and groundwater, making agricultural land unsafe and contaminating drinking water supplies.
The increasing use of drones and precision-guided missiles in modern conflicts adds another layer to this environmental crisis. Although such weapons are often described as “precision strikes,” their explosions still release hazardous materials. Drone warfare also involves large quantities of fuel consumption for surveillance aircraft, logistics operations, and satellite systems that support targeting and communication. The combined emissions and pollution from these activities contribute significantly to climate change and environmental degradation. Unfortunately, the environmental impact of war also extends far beyond the immediate battlefield. Destroyed buildings generate massive quantities of debris containing asbestos, heavy metals, and other hazardous materials. For example, recent conflict zones have produced tens of millions of tonnes of rubble and debris, much of it contaminated with toxic substances that pose long-term risks to soil and groundwater. Clearing this debris can produce significant carbon emissions and can take decades to complete.
Researchers estimate that the global military sector alone accounts for approximately 5.5% of total GHG emissions worldwide.
Another overlooked dimension of conflict pollution is its impact on climate change. Warfare consumes enormous amounts of fossil fuel through aircraft operations, armoured vehicles, naval fleets, and supply chains. Researchers estimate that militaries collectively generate hundreds of millions of tons of carbon emissions each year. Increased military spending and arms production further amplify these emissions by expanding defence industries and energy-intensive manufacturing. The environmental damage caused by war ultimately circles back to threatening human life. Polluted water sources lead to disease outbreaks. Contaminated soil reduces agricultural productivity and threatens food security. Air pollution from explosions and fires increases respiratory illnesses and long-term health risks. In this sense, environmental destruction is not separate from humanitarian suffering. It is simply another pathway through which war harms human societies.
Perhaps the most troubling aspect of conflict pollution is the lack of accountability. International climate agreements rarely require countries to report military emissions. Many governments treat military environmental damage as a secondary concern compared to strategic or political objectives. As a result, the true environmental cost of war often remains invisible in global climate calculations. If the international community is serious about protecting the planet, it must recognise warfare as a major environmental threat. Environmental monitoring should be integrated into conflict reporting. Military emissions must be included in climate accounting frameworks. Reconstruction efforts should prioritise ecological restoration alongside physical rebuilding. Peace negotiations should also incorporate environmental protection as a fundamental objective.
Ultimately, the environment is humanity’s shared inheritance. Unlike political borders or ideological conflicts, the atmosphere, oceans, forests, and rivers belong to all people. When war pollutes these natural systems, the consequences do not stop at national boundaries. Toxic clouds drift across continents, polluted rivers flow into shared seas, and rising global temperatures affect every nation. History shows that wars eventually end, but environmental damage can persist for generations. The soil poisoned by explosives, the forests destroyed by fire, and the oceans contaminated by oil spills continue to shape human lives long after the guns fall silent. The lesson is clear. Humanity cannot afford to treat environmental destruction as an acceptable side effect of war. Protecting the planet must become a central consideration in global security discussions. Otherwise, the true cost of conflict will continue to rise, not only in lost lives but also in the slow and silent destruction of the world that sustains them.
Dr Syed Asim Ali Bukhari is working as Band 4 /Unit Head – ESG at The Bank of Punjab, and Dr Syeda Nazish Zahra Bukhari is working as an Assistant Professor at the University of the Punjab.