A new role for chemists: Tackling toxic air in conflict zones

Armed conflict doesn’t just destroy lives—it chemically alters the environment in ways we’ve barely begun to measure. War zones become unregulated chemical reactors: Burning fuel depots, pulverized infrastructure, shattered electronics, and scorched forests release a torrent of pollutants into the atmosphere. Each conflict etches its own toxic fingerprint: fine particulate matter of 2.5 μm in diameter or smaller (PM2.5), black carbon, sulfur dioxide, dioxins, polycyclic aromatic hydrocarbons, heavy metals, microplastics, asbestos, and radionuclides, all interacting in unstable, synergistic ways that amplify harm across time and borders. These contaminants linger in lungs, rewire immune systems, and seed chronic illnesses in populations who have often lost everything else. The inhalable aftermath of modern warfareWhile humanitarian relief often focuses on trauma, malnutrition, and displacement, one question remains dangerously overlooked: What are people breathing? In Syria, deteriorating air quality led to a surge in respiratory illnesses amid the rubble. In Ukraine, war-driven wildfires have released nearly 163 million metric tons of emissions. In Gaza, bombed-out industrial zones emit plumes dense with unmonitored toxins—pollution that travels far beyond borders, ignoring ceasefires and peace treaties. This pattern is not new. In the Vietnam War, the US military deployed over 71 million liters of herbicides like Agent Orange, contaminating soil and water with dioxins that still affect generations through birth defects and cancers. During the 1991 Gulf War, the deliberate ignition of more than 600 Kuwaiti oil wells released massive clouds of black smoke laden with sulfur dioxide, polycyclic aromatic hydrocarbons, and heavy metals, darkening skies and