When Saddam Hussein burned oil wells in Kuwait in 1991, the United States called it environmental terrorism. When U.S.-Israeli airstrikes set Tehran's oil facilities ablaze in 2026, it became "operational necessity." The chemistry is identical. The moral framework, apparently, depends on who is holding the match.
The Black Rain Over Tehran
On March 8, 2026, residents of Tehran woke up to rain that looked wrong. Black droplets streaked apartment windows. Cars turned dark overnight. A teacher named Leila described the sky as "a black monster" that had "swallowed" the city.
Iran's Red Crescent Society issued emergency warnings: the rainfall was contaminated with toxic hydrocarbon compounds, sulfur and nitrogen oxides, capable of causing chemical burns and serious lung damage. People were told to seal their homes, bag their clothes, and pressure-wash their buildings before the residue dried into airborne toxic dust.
The cause was straightforward. Joint U.S.-Israeli airstrikes had hit multiple oil storage facilities and a production transfer center around Tehran, triggering massive fires that turned midday skies dark over a city of nearly ten million people.
The White House presented the campaign as precision strikes on Iranian military and fuel infrastructure, not on civilians. Right-wing commentators emphasized that the United States targets infrastructure, not civilians, repeating the familiar claim that "we don't target civilians." And technically, by the narrowest possible reading of international law, they may be correct. That's exactly the problem.
The Legal Loophole
The Chemical Weapons Convention, which entered into force in 1997 and today claims 193 signatory nations, is widely celebrated as one of the most successful disarmament treaties in history. It bans the development, production, and use of chemical weapons, defined as munitions "specifically designed to cause death or other harm through the toxic properties of those toxic chemicals."
Note that word: specifically. Conventional explosives aimed at fuel depots don't qualify. Even when everyone involved knows, with scientific certainty, that the resulting fires will release toxic hydrocarbon compounds, sulfur oxides, and nitrogen oxides into a densely populated urban area. Even when Iran's Red Crescent Society has to warn ten million people that their rain can burn their skin.
As long as the bomb is classified as targeting infrastructure rather than people, much of the law treats the resulting toxic fallout as incidental. Whatever its original intent, this legal framework now allows powerful states to inflict chemically mediated harm on civilian populations while maintaining technical compliance with the very rules they helped draft.
The Better World Campaign, tracking the Chemical Weapons Convention's 28th anniversary, put it plainly: the norm against chemical weapons is strong, but "we cannot take it for granted." What they didn't say is that certain states have spent years quietly eroding it from the inside.
Kuwait 1991: When Burning Oil Was a War Crime
This is not the first time the Persian Gulf region has choked on oil smoke. In early 1991, as Iraqi forces retreated from Kuwait under coalition bombardment, Saddam Hussein's troops ignited nearly 700 Kuwaiti oil wells. According to historical records, approximately five million barrels of oil burned daily. The town of al-Ahmadi experienced near-total darkness for months. Oil droplets and soot coated every exposed surface. Black rain fell. Acid rain followed. Civilians and soldiers alike reported respiratory illness, skin problems, and lasting health effects.
U.S. officials and media were unambiguous: this was environmental terrorism. A war crime. An act of barbarism against both the Kuwaiti people and the natural world. Scholars and journalists documented it as one of the worst man-made environmental disasters in history. The framing was consistent and firm. When the enemy does it, burning oil fields is an atrocity.
Fast forward to March 2026, and the language has shifted. Now it's "operational necessity." "Secondary effects." "Legitimate strikes on infrastructure." White House press secretary Karoline Leavitt told Fox News the strikes were "a short-term disruption for a long-term gain."
The toxic rain over Tehran is being treated as the acceptable cost of geopolitics. The underlying chemistry -- burning oil releasing hydrocarbons plus sulfur and nitrogen oxides -- is strikingly similar, and so are the kinds of risks civilians face. The moral framework, depending on who's holding the match, is apparently not.
The Precedents Are Older Than You Think
The loophole being exploited over Tehran didn't appear in 2026. It has a long and well-documented lineage.
During the Vietnam War, the United States sprayed Agent Orange, a defoliant containing dioxin, across Vietnam, Laos, and Cambodia. Agent Orange is now linked to cancers, endocrine disruption, and multigenerational birth defects. The U.S. legal defense was consistent: it was vegetation control, not a weapon "aimed" at human beings. The fact that it moved through the environment into human bodies was, officially, incidental.
Depleted uranium presents another chapter. Used in armor-piercing munitions across the Gulf War, Operation Iraqi Freedom, and beyond, depleted uranium can aerosolize on impact, embedding radioactive particles in soil, dust, and human tissue. The Lieber Institute at West Point, analyzing the legality of U.S. transfers of depleted uranium rounds to Ukraine, concluded that no specific treaty bans their use because they are "anti-materiel, not anti-personnel" munitions. The fact that their residue persists in environments, enters food chains, and accumulates in bodies is, again, officially incidental.
What connects Agent Orange, depleted uranium, and the burning oil depots of Tehran is the same legal architecture: define the weapon narrowly, route the harm through the environment, and the law's hands are tied.
A 2025 systematic review published in the Journal of Toxicology identified at least 121 documented instances of chemical weapon use throughout history, causing over two million injuries and nearly three million deaths. The review covered ancient arsenic fumes, World War I mustard gas, and Saddam Hussein's sarin attacks on Kurdish civilians. What it could not easily categorize were the cases where powerful states caused chemically mediated mass harm while technically staying outside the definition of "chemical warfare." That category has no clean box.
Both Parties Own This Playbook
There is a temptation to frame this as a Trump problem, or an Israel problem, or a MAGA problem. It isn't, at least not exclusively. Democratic administrations escalated chemical defoliation in Vietnam. Both parties defended depleted uranium use through the 1990s and 2000s. The targeting of "dual-use" fuel and power infrastructure, which predictably cuts off electricity, clean water, and hospital capacity for entire civilian populations, has been a bipartisan feature of U.S. air campaigns in Iraq, Syria, and now Iran.
The real divide isn't left versus right. It's empire versus accountability. Both major parties have accepted a model of warfare where environmental destruction is fair game as long as it travels through infrastructure rather than directly into bodies.
The Rain Doesn't Care About the Law
Children in Tehran watched black droplets stain their balconies. Elders were told to stay inside because the air outside could damage their lungs. A university professor 70 miles away didn't recognize his own car. These people were not targeted. By law, they were simply in proximity to infrastructure. That distinction matters enormously to lawyers. It means nothing to lungs.
The history of U.S. military action is littered with people who were not targeted: Vietnamese farmers whose children were born with limb deformities decades after the planes stopped flying; Gulf War veterans who came home with a constellation of chronic symptoms that took years for the VA to partially acknowledge; Kuwaiti civilians who drank from aquifers that were eventually 40% poisoned by oil that percolated into the ground from the 1991 fires.
If we only look for war crimes in the narrow sense of gas attacks and deliberate massacres, we will keep missing the slow violence. The cancers. The birth defects. The poisoned soil. The black rain.
U.S. lawyers have successfully tucked all of it behind the phrase "not specifically designed to harm humans."
Critics might note that framing this as a simple legal loophole understates the genuine complexity of distinguishing legitimate military targets from civilian infrastructure, and that any strike on enemy fuel supply inevitably creates environmental hazards regardless of intent. The distinction between deliberate chemical attack and predictable environmental consequence, while legally meaningful, may be morally indefensible.
Bottom Line
The core argument is powerful: the Chemical Weapons Convention's narrow definition allows states to inflict chemically mediated harm while maintaining technical compliance. The strongest part of this piece is the historical comparison -- when Saddam burned oil in Kuwait, it was called a war crime; when the U.S. does it, it's "operational necessity." The biggest vulnerability is that framing the pattern as purely bipartisan obscures the genuine difficulty of balancing military necessity with civilian protection under international law. Watch for future investigations into secondary effects of airstrikes -- those stories are being buried under Pentagon press releases and five-second news cycles.