The Hidden Cost of Oil: Not Just the Climate – But War Itself

10 March 2026

We talk endlessly about fossil fuels and the environment. We talk rather less about something arguably more urgent: the direct link between hydrocarbon dependency and geopolitical instability.

The argument is straightforward, if uncomfortable. So long as the global economy runs on oil and gas, the nations and actors who control supply routes hold the rest of the world to ransom. That is not a metaphor. It is a strategic reality – and Iran has been demonstrating it with considerable precision.

The Strait of Hormuz, the narrow chokepoint through which roughly a fifth of the world’s oil passes, has become Tehran’s lever of choice. Drone attacks on tankers, threats to close the strait entirely, the targeting of production infrastructure across the Persian Gulf – these are not random provocations. They are the deliberate weaponisation of energy dependency. When a single nation-state can destabilise global markets, trigger inflationary shockwaves across Europe and threaten the energy security of dozens of countries simultaneously, the political cost of fossil fuel reliance becomes starkly visible.

The economic arguments for hydrocarbons have always been well rehearsed: they are energy-dense, relatively cheap, and the existing infrastructure around them is vast. Transition is genuinely hard. But the geopolitical calculus is shifting. OPEC’s grip has loosened, drilling technology has advanced, and new supply sources have emerged. Yet dependency endures – and with it, vulnerability.

The climate case for moving beyond oil and gas has been made, repeatedly and compellingly. The security case is equally powerful, and perhaps more immediately persuasive to those who remain unmoved by environmental argument. Every barrel of oil that can be replaced by domestic renewable generation is a barrel that cannot be held hostage.

Energy transition is not merely an environmental imperative. It is a peace dividend waiting to be collected.