A catastrophic scenario is quietly unfolding in the corridors of global maritime trade. New, high-level modelling commissioned by the International Chamber of Commerce (ICC) has revealed that a prolonged closure of the Strait of Hormuz—the world’s most critical maritime chokepoint—could trigger a seismic shift in global food security, precipitating a humanitarian crisis of historic proportions.
The study, conducted by a consortium of researchers from the University of Edinburgh, the University of Aberdeen, and Scotland’s Rural College, paints a grim picture: a sustained disruption to the flow of energy and fertiliser inputs through this narrow waterway could result in one million additional diet-related deaths by 2030 and leave 67 million more people suffering from underweight conditions. As geopolitical tensions rise in the Persian Gulf, the world is beginning to realise that the fallout from such a conflict will not be confined to oil prices, but will be measured in the nutritional health of the planet’s most vulnerable populations.
The Mechanics of the Shock: A Chain Reaction
The Strait of Hormuz serves as a vital artery for the global economy. Before its potential closure, the route facilitated the movement of approximately 40% of the world’s urea—the most common nitrogen-based fertiliser—alongside 20% of global oil supplies and over 20% of liquified natural gas (LNG).
The modelling illustrates how a disruption here triggers a cascading failure in the global food supply chain. When the Strait is blocked, the immediate casualty is the price of energy and nitrogen-based fertilisers. Because nitrogen fertiliser production is highly energy-intensive, the supply shock creates a "double-squeeze" on farmers.
The researchers found that such a disruption would lead to a 37% reduction in nitrogen fertiliser usage globally. With lower application rates, cereal productivity is projected to drop by up to 10%. As supply tightens, the market response is inevitable: a sharp, sustained spike in global cereal prices. In the study’s "severe scenario," cereal prices are projected to rise by as much as 81% above 2020 levels, with consumer food prices in East Asia, the Pacific, and Sub-Saharan Africa surging by nearly 70%.
Chronology of a Looming Emergency
To understand the gravity of the situation, one must look at the timeline of current market volatility:
- Pre-Disruption Baseline: Prior to the current instability, markets were already recovering from post-pandemic inflation. Urea and energy prices were considered volatile but functional.
- The Onset of Uncertainty: As regional tensions in the Persian Gulf escalated, maritime insurance premiums spiked, and shipping lines began re-evaluating routes. This created a psychological "fear premium" on top of actual supply constraints.
- The "Demand Destruction" Phase (April–June): Industry data indicates that between April and June, approximately 3.7 million tonnes of urea demand were either destroyed or deferred—a 27% year-on-year decline. While some observers mistook this for a market "cooling off," experts warn it was actually a sign of farmers stepping back from the market, unable to afford the escalating costs of inputs.
- The Planting Gap: The current window of stability is fragile. As the next major planting seasons approach, the pent-up demand for fertilisers is expected to hit a supply-constrained market, threatening a secondary, more aggressive price spike.
- The 2030 Horizon: The model projects that the long-term impacts will linger long after the Strait is theoretically reopened. Even under a recovery scenario, the disruption to planting cycles and inventories would leave millions of people underweight well into the next decade.
Supporting Data: The Anatomy of the Crisis
The ICC-commissioned research provides a granular look at the demographic and geographic distribution of the catastrophe. The findings are sobering:
The Geography of Suffering
The burden of this food security crisis is not distributed equally. The modelling indicates that 80% of the additional mortality and over 90% of the additional underweight burden will fall on three specific regions: South Asia, Sub-Saharan Africa, and East Asia and the Pacific.
In contrast, higher-income nations possess the fiscal capacity, social safety nets, and market leverage to shield their populations from the worst of these price shocks. In some wealthy, overconsuming nations, the study suggests that higher food prices might even have the unintended consequence of reducing excessive caloric intake, a stark contrast to the starvation risks faced elsewhere.
Lasting Welfare Effects
The research highlights that the "recovery" of trade routes will not equate to an immediate recovery for the human population. In scenarios where it takes five years for global prices to return to pre-disruption levels, an additional 7 to 16 million people would still be suffering from underweight conditions by 2030. This suggests that the damage done to agricultural supply chains—such as abandoned farmland, depleted stocks, and reduced investment in irrigation—will create a "long-tail" effect that persists long after the geopolitical conflict subsides.
Official Responses and Calls to Action
The International Chamber of Commerce has been at the forefront of warning governments and international bodies of the humanitarian stakes involved.
ICC Secretary General John W.H. Denton AO has been unequivocal in his messaging: "The new research exposes the extraordinary risk that continued disruption in the Strait of Hormuz poses to global food systems. Restoring commercial shipments of fertilisers and related inputs through Hormuz must be understood as a global humanitarian imperative."
Denton warned against the complacency currently seen in some financial markets. "The recent fall in urea prices should not be mistaken for market normalisation," he stated. "Much of the adjustment has come from farmers and buyers stepping back, rather than a durable restoration of supply. As demand returns ahead of forthcoming planting seasons, there is a real risk that prices could spike again."
The ICC is now urging governments to move beyond rhetoric. They are calling for:
- Temporary Humanitarian Corridors: Activating mechanisms to facilitate the safe and predictable movement of essential agricultural nutrients before critical planting windows close.
- Financial Support Packages: Providing coordinated financial assistance to import-dependent, low-income nations that lack the fiscal space to weather sustained price shocks.
- Diplomatic Priority: Elevating the security of agricultural inputs to the same priority level as energy security in international diplomatic negotiations.
Implications for Global Policy and Public Health
The research, led by Dr. Jay Burns of the University of Edinburgh, underscores a critical shift in how we must view geopolitical conflicts.
"The crisis centred on the Strait of Hormuz is creating a chain reaction from conflict to nitrogen fertiliser and energy price spikes, and on to food security and human health," Dr. Burns explained. "The impacts of this localised conflict are felt globally, and our research highlights how those with the least capacity to absorb the resulting price shocks are likely to feel them most severely."
The "Planetary Health" Discourse
The implications of the study reach into the heart of the "planetary health" discourse—the understanding that human health is inextricably linked to the health of our global systems. When supply chains break, the primary victims are those who spend the largest share of their household income on food. Even a modest price increase for these families means an immediate reduction in both total calorie intake and dietary diversity, leading to compounding health issues.
A Call for Global Resilience
The study serves as a wake-up call for policymakers. It highlights that the global food system is far more fragile than commonly assumed. By centralising vital inputs through narrow maritime chokepoints, the world has created a "single point of failure" that invites disaster.
The findings suggest that resilience-building—diversifying supply chains, increasing domestic fertiliser production capacities, and investing in climate-resilient and nutrient-efficient farming—must become a global policy priority. Until then, the stability of the Strait of Hormuz remains not just a matter of energy policy, but a matter of life and death for millions.
As the international community grapples with these findings, the message from the scientific and business community is clear: inaction is a policy choice, and in this instance, it is a choice that will be paid for in human lives. The clock is ticking toward the next planting season, and with it, the potential for a crisis that the global food system may not be equipped to survive.
