Study predicts only two countries survive nuclear war

Published: March 6, 2026 | The English Chronicle Desk | The English Chronicle Online

A new scientific study has warned that only two countries may be capable of sustaining their populations after a large-scale nuclear war, predicting that most of the world could face catastrophic food shortages as survivors struggle to find enough to eat.

The research, conducted by international climate and food security experts, explores the potential consequences of a global nuclear conflict and the resulting environmental impact known as “nuclear winter.” According to the study’s projections, massive fires triggered by nuclear explosions would release enormous quantities of soot into the atmosphere, blocking sunlight and causing global temperatures to drop sharply.

The dramatic cooling of the planet would devastate agricultural production across much of the world. Crops would fail in many regions, growing seasons would shrink, and global food supply chains could collapse. Scientists warn that these conditions would likely trigger widespread famine and social breakdown as people compete for limited resources.

However, the study suggests that two countries could have a significantly higher chance of maintaining food production even under these extreme conditions: Australia and New Zealand. Researchers say the geographic isolation of these nations, combined with their strong agricultural sectors and relatively small populations, could allow them to remain more resilient than most other countries.

According to the modelling used in the study, global temperatures could drop dramatically in the aftermath of a nuclear conflict between major powers. Smoke from burning cities and forests would spread across the stratosphere, reflecting sunlight away from the Earth and plunging the planet into prolonged cooling.

Such a scenario would severely disrupt global agriculture. Major grain-producing regions in North America, Europe and Asia could see harvests collapse due to shorter growing seasons and reduced sunlight. Even countries not directly involved in the war would face severe food shortages.

The study warns that global food production could fall by as much as 90 percent in the most extreme scenarios. Under these conditions, billions of people could face starvation within a few years of the conflict.

Australia and New Zealand stand out in the research because of their geographic position in the southern hemisphere. Their distance from likely nuclear targets and major conflict zones would reduce the immediate destruction caused by nuclear strikes.

In addition, both countries produce more food than their populations consume under normal conditions. Their agricultural systems are heavily export-oriented, meaning that if international trade collapsed after a nuclear war, much of that food could potentially be redirected to domestic use.

The researchers also note that the island geography of New Zealand and Australia could provide an additional advantage. Isolation would make it easier to control borders and maintain internal stability during a global crisis in which millions of people might attempt to migrate in search of food and safety.

Even so, scientists caution that survival would not be guaranteed. A nuclear winter would still have severe consequences for agriculture in these countries. Lower temperatures, reduced sunlight and changing rainfall patterns would affect crop yields and livestock production.

The research predicts that surviving populations might have to rely heavily on rationing systems and alternative food sources. Governments could be forced to impose strict controls on food distribution to prevent shortages and maintain social order.

In the worst cases, societies could experience widespread unrest as people compete for scarce resources. The study warns that food scarcity has historically been one of the most powerful triggers of conflict and instability.

Urban populations would likely face the most severe difficulties. Cities rely heavily on complex supply chains that transport food from rural areas and international markets. If those networks collapsed, many urban residents could struggle to access basic necessities.

The research also emphasises that modern agriculture is highly dependent on global infrastructure, including fertiliser production, fuel supplies and international trade. A nuclear war could disrupt all of these systems simultaneously, further reducing the world’s ability to produce and distribute food.

Scientists involved in the study say their work is intended to highlight the global risks associated with nuclear weapons rather than to predict a specific conflict. They argue that understanding the environmental consequences of nuclear war is essential for policymakers seeking to prevent such a disaster.

Previous research into nuclear winter has produced similar warnings. Studies dating back to the Cold War era suggested that even a limited nuclear exchange could produce dramatic climate effects and threaten global food supplies.

More recent climate modelling techniques have allowed scientists to refine these predictions with greater accuracy. Advanced computer simulations now make it possible to estimate how smoke particles from nuclear fires would circulate through the atmosphere and affect global temperatures.

Despite improvements in modelling technology, researchers say the fundamental conclusion remains unchanged: a large-scale nuclear war would represent one of the greatest threats to human civilisation.

The study’s findings arrive at a time when geopolitical tensions among major nuclear-armed powers have increased. Several countries continue to modernise their nuclear arsenals, while diplomatic efforts aimed at reducing nuclear stockpiles have slowed in recent years.

Experts in international security warn that the humanitarian and environmental consequences of nuclear conflict extend far beyond the countries directly involved in the fighting. Even nations located far from the battlefield would experience severe economic and ecological disruption.

For policymakers, the research serves as a stark reminder that nuclear weapons pose a global risk that cannot be contained within national borders. While some regions might fare better than others, the overall impact on humanity would be devastating.

Scientists say the best protection against such a scenario remains preventing nuclear war altogether. Once a large-scale exchange occurs, the environmental damage could persist for years, reshaping the planet’s climate and threatening food security for billions of people.

The study concludes that no country would truly emerge unscathed from a nuclear conflict. Even the nations most likely to survive would face enormous challenges in maintaining stable societies and ensuring that their populations have enough to eat.

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