For years, environmental, social and governance (ESG) considerations have been framed – sometimes derisively – as an ethical overlay on financial decision making. To critics, ESG has too often been caricatured as “virtue investing”, a well-meaning but optional add on.
But the global reverberations from the Iran crisis have forced a necessary reframing. What is unfolding in the Strait of Hormuz is not only a geopolitical flashpoint, it is a vivid demonstration that environmental pressures, resource vulnerabilities and system-level shocks are inseparable from macroeconomic stability.
The central point is increasingly difficult to ignore: ESG risks are economic risks.
They are not theoretical, they are not abstract future problems, and they are not confined to specialist sustainability debates. They are visible now in inflation dynamics, supply-chain fragility, commodity price volatility and the day-to-day operational realities facing companies.
When instability in a single region can influence inflation expectations, reprice risk, alter capital allocation and reshape earnings expectations across sectors, the distinction between “virtuous” and “financial” sustainability begins to break down.
The Iran crisis illustrates that energy dependence, water stress, and food-system fragility are not peripheral environmental concerns. They are central to the functioning of modern economies.
This is the true lesson: ESG is not a parallel value system sitting beside economics. It is part of the architecture of long-term resilience. The Iran crisis merely amplifies what has been building for years: the risks we once considered “non-financial” have become systemic financial risks.
The inflationary impact of high energy prices – the macroeconomic transmission mechanism of ESG failure
Energy remains the clearest and most immediate channel through which geopolitical instability feeds into the real economy. The Iran conflict is again demonstrating what markets learned in 2022 after Russia’s invasion of Ukraine: fossil-fuel dependence is not only a question of affordability but macroeconomic vulnerability.
A chokepoint with global consequences
Roughly one-fifth of the world’s crude oil and liquefied natural gas transits through the Strait of Hormuz. When disruption occurs there, the impact does not remain regional. It can transmit rapidly through currencies, inflation expectations, sovereign bond yields and corporate margins across major economies.
If geopolitical risk then intensifies, the transmission mechanism commences:
• Higher oil prices lift inflation expectations
• Higher inflation complicates central bank policy
• Higher interest rates raise borrowing costs for households, companies and governments
• Higher financing costs weigh on investment, growth and employment.
This is not a hypothetical chain of events. Variations of it have been seen repeatedly — from the oil shocks of the 1970s to the Gulf crisis of 1990 and the energy disruption that followed the invasion of Ukraine in 2022. The current Iranian crisis underlines an unrelenting broader truth: the fossil-fuel system remains highly sensitive to disruption at a small number of geopolitical chokepoints.
Industries already under stress
Even before the latest escalation, sectors with thin margins and high exposure to transport or energy costs were vulnerable.
Airlines, logistics providers, chemicals producers, manufacturers and energy-intensive industries are all directly exposed to energy cost volatility. Higher bunker fuel costs lift freight rates, higher jet fuel prices compress airline margins and higher diesel costs increase costs for farming, road haulage and construction.
These knock-on effects compress margins, slow investment and reduce competitiveness.
The deeper issue is not price, but fragility
Public debate often focuses on visible indicators such as pump prices or the level of Brent crude. Those matter, but they are symptoms rather than the core issue. The deeper problem is structural fragility.
Energy systems reliant on fossil fuels are inherently brittle with fossil-fuel-based energy systems relying on inputs that are geographically concentrated, physically transport-dependent and politically exposed.
When one narrow shipping route can influence global inflation, the case for reducing fossil-fuel dependence becomes a matter of national resilience, not environmental aspiration.
That is one of the clearest economic messages of the Iran crisis: a world economy still heavily reliant on fragile fossil-fuel supply chains remains vulnerable to geopolitical disruption in ways that are both f inancially and socially consequential.
Food – fertilisers, freight and the agricultural domino effect
Food systems are often discussed through the lens of land use, emissions or biodiversity. Those issues matter. But the Iran crisis has highlighted two other important realities: 1) food production is deeply linked to energy markets and, 2) fertiliser markets are reliant on a small number of key exporters.
The deeper issue is not price, Energy prices and input availability drive fertiliser prices — and fertiliser prices shape food prices
Nitrogen fertilisers, which underpin modern agricultural productivity, are produced largely using natural gas. This means that as much as 60% of fertiliser production costs come from energy inputs. Therefore, when gas prices rise, fertiliser prices tend to rise with them, and then food prices often follow.
Further, nitrogen (urea), phosphate and potash markets share a familiar feature with oil and gas as production and trade are concentrated in a limited number of regions and routes. When disruption affects the Strait of Hormuz, it is not only LNG cargoes that are at risk as fertiliser inputs are swept into the same vortex of uncertainty.
Today, the Iran crisis has triggered concerns that the increased volatility in gas markets will push fertiliser prices higher, that the rising input costs are placing renewed pressure on farm economics across the UK and Europe, and that shipments of fertiliser inputs through the Strait of Hormuz face an added risk of disruption and subsequently add further costs.
For farmers, the responses to these elevated input costs are limited. They can only undertake the following actions:
• reduce fertiliser use and risk lower yields
• shift to less input-intensive crops disrupting crop cycles and supply expectations
• absorb the cost and accept tighter margins
• pass the cost through the supply chain, raising prices for consumers.
Each path carries economic consequences somewhere in the supply chain and no approach is cost-free.
Why innovation in fertiliser now looks strategic, not merely green
As a result, the current crisis is also strengthening the case for alternatives to conventional fertiliser systems, including green ammonia produced using renewable hydrogen, nutrient recycling and other circular-input models, precision agriculture technologies that improve the efficiency of fertiliser application, and soil-health practices that reduce reliance on synthetic inputs.
These are not simply environmental preferences. They are increasingly relevant options as risk-mitigation tools and economic hedges against fossil fuel volatility and input availability issues.
Just as renewable energy investment surged after 2022, investment in fertiliser innovation is increasingly justified less by environmental goals and more by supply chain risk mitigation.
The Iran crisis shows that any ESG analysis that omits the food-energy nexus is incomplete. Food inflation does not begin in the supermarket. It begins further upstream in gas fields, shipping lanes and fertiliser plants. Any investment analysis that fails to consider these considerations is overlooking material economic risks.
Water – the often overlooked but economically critical ESG frontier
Of the environmental risks exposed by the Iran crisis, water may be the least appreciated by financial markets and yet one of the most consequential. Energy shocks are immediate and visible and food price shocks are widely understood. Whereas water insecurity is often slower moving, but it can be equally disruptive.
Iran’s water stress was already severe Iran entered the crisis with deep structural water challenges and facing long-term water scarcity:
• it was already using more than 80% of its renewable water resources each year
• rainfall in 2025 was substantially below average following multiple years of drought
• agriculture, which accounts for roughly 90% of national water use, was already under increasing strain. This is not solely a humanitarian issue as water scarcity can constrain industrial production, weaken agricultural output, encourage migration and intensify domestic instability.
Desalination is both a lifeline and a vulnerability
The conflict has also drawn attention to an especially sensitive part of the regional water system: desalination infrastructure.
These facilities are highly energy-intensive, essential to household and industrial water supply across parts of Iran and the Gulf and inherently exposed because of their coastal location and strategic importance.
Where desalination capacity is concentrated and reserve coverage is limited, infrastructure damage can quickly become an economic and public-service issue.
Water risk is financial risk
For investors, water stress can appear geographically remote until it begins to affect output, logistics or political stability. In reality, water insecurity can transmit economically through several channels:
• lower industrial output in sectors such as manufacturing, petrochemicals and mining
• disruption to energy systems, like power plants, that depend on water for cooling and processing
• higher prices from impaired food production and agricultural trade • increased logistics and infrastructure risk
• heightened social and political instability.
In the context of the Iran crisis, water also intersects directly with the energy system currently driving inflation concerns. Water is needed for refining, petrochemicals, thermal power generation and cooling. Water is not an ancillary concern, it is a foundational input underpinning key processes.
This conflict has reiterated that water-related ESG risks are financially material. They can amplify existing shocks, accelerate instability and create second-order effects across sectors and borders.
Conclusion – the environmental transition is the economic transition
The Iranian conflict has again revealed that environmental and geopolitical risks cannot be separated. Energy insecurity can feed inflation, water insecurity can disrupt both households and industry, and fertiliser disruption can raise food costs.
Each shock feeds into another, propagating risk through the global financial system.
That is why ESG should not be treated or considered as an ethical framework or a peripheral screen within investment analysis.
ESG is first and foremost a framework for understanding, identifying and assessing risk. It is a valuable tool for understanding system-level financially material vulnerabilities.
Read more: The death of lazy ESG
