A prolonged disruption to the fertilizer and energy markets stemming from a potential closure of the Strait of Hormuz could trigger a catastrophic surge in global cereal prices, potentially increasing them by 81% above 2020 levels, according to comprehensive new modeling commissioned by the International Chamber of Commerce (ICC). The study, which underscores the fragility of the global food supply chain, warns that such a shock would have devastating consequences for public health and food security, particularly in the Global South, where the impact on households could manifest as a 70% increase in consumer food costs.
The research, conducted by a multidisciplinary team from the University of Edinburgh, the University of Aberdeen, and Scotland’s Rural College, highlights a "chain reaction" that begins in the volatile geopolitical landscape of the Middle East and ends in a global humanitarian crisis. By simulating the effects of a sustained closure of the Strait—a critical maritime chokepoint—the researchers demonstrated how the interruption of energy and agricultural input flows would cascade through the international economy.
The Chokepoint Crisis: Fertilizer and Energy Interdependence
The Strait of Hormuz is widely regarded as the world’s most important oil transit chokepoint, but its role in the global agricultural sector is equally vital. According to the ICC report, the Persian Gulf producers who rely on this narrow waterway account for approximately 40% of the global trade in urea, a primary nitrogen-based fertilizer. Additionally, the route facilitates nearly 20% of the world’s total oil supply and more than 20% of the global liquefied natural gas (LNG) trade.
Nitrogen fertilizer production is an energy-intensive process that relies heavily on natural gas. When the supply of energy or the fertilizer itself is restricted, the agricultural industry faces a dual-pronged crisis of rising production costs and diminishing yields. The modeling suggests that a disruption in the Strait would lead to a 37% reduction in nitrogen fertilizer use globally. This shortage, in turn, would cause a decline in cereal productivity of up to 10%, creating a supply-demand imbalance that forces prices to historic highs.
Economic Modeling: From Trade Blockage to Cereal Price Surges
The study presents several scenarios, with the most severe projecting cereal prices rising 81% above the 2020 baseline. While global commodity markets are accustomed to fluctuations, a shock of this magnitude would be unprecedented in the modern era. The researchers found that the price increases would be felt most acutely by consumer households in East Asia, the Pacific, and Sub-Saharan Africa, where food prices could rise by nearly 70%.
This economic shock is not merely a matter of higher grocery bills; it represents a fundamental threat to the ability of billions of people to access basic nutrition. For lower-income populations, food expenditures often comprise the largest portion of the household budget. When prices spike, these households are forced to make desperate trade-offs, often reducing calorie intake or shifting from nutrient-dense foods like vegetables and proteins to cheaper, starch-heavy staples.
The Human Cost: A Projected Surge in Mortality and Malnutrition
The most sobering aspect of the ICC-commissioned research is the projected impact on human health. The modeling suggests that under a severe and sustained disruption scenario, the resulting food insecurity could contribute to approximately one million additional dietary health-related deaths by 2030. Furthermore, an estimated 67 million more people could fall into the category of "underweight" due to insufficient caloric intake.
Dr. Jay Burns, the lead author of the study from the University of Edinburgh, noted that the crisis creates a direct link between localized conflict and global mortality. "The impacts of this localized 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," Dr. Burns stated. He added that while wealthier countries have the fiscal capacity and social safety nets to buffer their populations from the worst effects, the world’s poorest households face compounding reductions in both total calorie intake and dietary diversity.
Regional Disparities: The Burden of Global South Vulnerability
The study emphasizes that the burden of a Strait of Hormuz closure would fall overwhelmingly on lower-income regions. South Asia, Sub-Saharan Africa, and East Asia and the Pacific are expected to account for roughly 80% of the additional mortality and more than 90% of the additional underweight burden. In contrast, modeled health outcomes in high-income regions like North America and Western Europe would change very little, despite the increased cost of living.
This disparity highlights the "planetary health" dimension of geopolitical instability. In some "overconsuming" countries, the researchers noted that higher food prices might actually lead to a modest reduction in excessive demand, which could have marginal health benefits in terms of reducing obesity-related issues. However, these minor shifts in the West are dwarfed by the life-threatening deprivation facing the Global South.
Market Dynamics: The Deceptive Calm of Recent Price Fluctuations
In response to the findings, ICC Secretary General John W.H. Denton AO cautioned policymakers and market analysts against complacency. While urea prices have seen a recent decline, Denton argued that this should not be mistaken for a return to market normalcy.
"Industry estimates suggest that 3.7 million tonnes of demand was destroyed or deferred between April and June—a 27% year-on-year decline," Denton said. "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’s position is that the current market stability is fragile and artificial, built on deferred demand rather than a robust supply chain. If the Strait of Hormuz were to face a sudden or prolonged closure, the latent demand for fertilizers would collide with a restricted supply, causing an even more violent price correction than the models predict.
Geopolitical Context: The Strait of Hormuz as a Global Pivot Point
The Strait of Hormuz, which at its narrowest point is only 21 miles wide, has long been a focal point for international tension. Bordered by Iran to the north and Oman and the United Arab Emirates to the south, it is the only sea passage from the Persian Gulf to the open ocean. Historically, the Strait has been the site of numerous maritime incidents, including the "Tanker War" of the 1980s and more recent seizures of commercial vessels.
The current geopolitical climate in the Middle East has heightened concerns about the security of the route. Analysts suggest that any escalation in regional hostilities could lead to a blockade or a significant increase in insurance premiums for shipping, effectively closing the route to commercial traffic. Unlike other maritime routes, there are limited land-based alternatives for the volume of energy and fertilizers that pass through Hormuz daily.
A Lasting Legacy: The Long-Term Impact of Disrupted Trade
The research further indicates that even a gradual recovery from a disruption would leave lasting scars on global health and the economy. In scenarios where trade flows take five years to return to normal, the study estimates that an additional 7 to 16 million people would still be underweight in 2030.
This persistence is due to the cyclical nature of agriculture. Disruption to planting cycles, the depletion of inventories, and the erosion of market confidence create a "hangover" effect that prevents an immediate return to pre-crisis levels of food security. The authors caution that the restoration of trade flows does not automatically repair the damage done to human health or the stability of local markets.
The Path Forward: Calls for Humanitarian Corridors and Fiscal Support
The ICC has called for immediate international cooperation to mitigate these risks. Central to their proposal is the establishment of practical arrangements to ensure the safe and predictable movement of fertilizers and essential agricultural inputs through the Strait, regardless of the prevailing political climate.
"Restoring commercial shipments of fertilizers and related inputs through Hormuz must be understood as a global humanitarian imperative," Denton asserted. He urged governments to activate temporary mechanisms to facilitate the movement of nutrients before critical planting windows close.
Furthermore, the ICC is advocating for coordinated financial support for vulnerable, import-dependent economies. This includes debt relief and increased fiscal aid to help these nations manage the soaring costs of food and energy imports. Without such intervention, the "extraordinary risk" identified by the University of Edinburgh researchers may soon become a reality, undoing decades of progress in global nutrition and public health.
As the international community grapples with the findings of this report, the message is clear: the stability of the global food system is inextricably linked to a single, narrow strip of water in the Middle East. The cost of inaction, as measured in human lives and economic stability, remains unacceptably high.
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