The Iran War Is Fueling a Boom in Clean Energy

Clean energy means energy sources that produce little or no carbon pollution during use, especially the wind and solar power highlighted in the article. Battery storage also supports clean electricity by helping systems rely less on fossil fuels. The Iran war is linked to clean energy because it exposed how vulnerable countries are when they depend on one fossil-fuel route.

The near closure of the Strait of Hormuz disrupted normal oil and gas trade. Governments had to cut fuel use, find alternative suppliers, and accelerate renewable projects. This crisis made wind, solar, and storage look like tools for energy security, not only climate policy.

The shift is already visible. Renewable investment is now around double fossil-fuel investment, and almost all new grid capacity comes from clean sources. The Carbon Brief analysis expects the conflict to reduce fossil-fuel emissions by 0.5 percent in 2026, although some countries also increased coal use.

The Strait of Hormuz normally carries around one-fifth of the world’s oil and gas. It is therefore a crucial passage in international fossil-fuel trade. A disruption there can affect far more than the countries immediately surrounding the waterway.

After the U.S.-Israeli-led attack on Iran in February, the strait was nearly closed. Countries that usually depend on shipments through it had to scramble to find other supplies and reduce consumption. Some also turned to wind and solar power, while others increased coal use slightly.

The scale of the route helps explain why the conflict affected global energy planning. Carbon Brief expects the war’s impact to cut fossil-fuel emissions by 0.5 percent in 2026. The IEA also estimates that peak oil consumption may arrive this year, earlier than its previous 2029 forecast.

When trade through a major oil route is restricted, countries can no longer rely on their usual fuel deliveries. They face pressure to find alternative suppliers, reduce oil and gas consumption, and protect energy security. The disruption can also expose how deeply economies depend on fossil fuels.

The near closure of the Strait of Hormuz showed this mechanism clearly. Governments scrambled to replace missing imports and cut oil and gas use. Several turned to wind and solar power, while some countries saw a slight rise in coal use. The same crisis therefore encouraged both cleaner energy and a dirtier short-term response.

The longer-term effect may be diversification. More than 30 governments have enacted policies to move away from fossil fuels or improve efficiency in response to the conflict. Carbon Brief expects a 0.5 percent reduction in fossil-fuel emissions in 2026, but experts say sustained action is still needed.

Dependence on imported fossil fuels makes governments vulnerable to events beyond their control. If a key route is blocked, deliveries can be disrupted and energy security becomes uncertain. Diversifying the energy mix gives countries more ways to keep electricity, transport, and industry operating.

The Strait of Hormuz crisis demonstrated the risk. It normally handles around one-fifth of global oil and gas, but its near closure forced governments to seek alternative suppliers and cut consumption. The disruption also encouraged investment in wind, solar, and battery storage. These measures reduce reliance on one fuel source and one trade route.

The article notes that governments would be less eager to diversify if all restricted exports were easily available elsewhere. Because they were not, energy security became a stronger reason to act. More than 30 governments have since adopted transition or efficiency policies, though experts say long-term progress requires sustained support.

Countries have several ways to reduce reliance on imported oil and gas. They can deploy renewable sources such as wind and solar, expand battery storage, improve energy efficiency, and encourage electric vehicles. They can also seek alternative fossil-fuel suppliers, but that mainly changes the source of imports rather than ending dependence.

The Iran war pushed governments to use these options together. Restrictions through the Strait of Hormuz led countries to cut oil and gas use, find other suppliers, and accelerate renewable deployment. Battery storage can support clean power capacity, while electric vehicles reduce oil demand in transport. Efficiency lowers the amount of energy needed overall.

The transition is already gathering speed. Renewable investment has risen to around twice fossil-fuel investment, and almost all new grid power comes from clean sources. Around one in four cars sold in 2025 was electric. The article says stronger policies and incentives are still needed.

These technologies require large, coordinated changes across power, transport, and industry. Government policies can create demand, reduce investment risk, and make new infrastructure possible. Public funding and incentives also help technologies expand before private markets can deliver them at the needed speed.

The article points to renewable growth after the Covid-19 pandemic. With enough funding and policy support, countries showed that clean-energy capacity could expand rapidly. Similar support can encourage electric-vehicle purchases, build battery storage, and improve energy efficiency. Together, these measures make energy systems less dependent on imported fossil fuels.

The current trend is strong but incomplete. Renewable investment is around double fossil-fuel investment, and almost all new grid additions are clean energy. Yet governments continue supporting fossil-fuel expansion in some cases. Researchers say long-term policies and incentives are needed to turn rapid growth into lasting emissions reductions.

Replacing fossil fuels is difficult because they serve two roles. They provide energy for electricity, heating, transport, and industry, but they are also used as inputs for fertilisers, petrochemicals, and many goods. Moving away therefore requires changes to both energy systems and material production.

The war made this wider dependence visible. The article notes that the crisis quickly revealed how much the world relies on fossil fuels for fertilisers, petroproducts, and a broad range of goods. Delphine Lévi Alvarès said society cannot continue using fossil fuels for energy and “absolutely everything around us.”

Wind, solar, electric vehicles, and batteries can reduce fossil-fuel use in power and transport, but they do not solve every material need described. Governments therefore need broader policies, efficiency measures, and cleaner production methods. The article warns that current governments still support fossil-fuel expansion while acknowledging the importance of clean power.