Nuclear winter refers to extreme global cooling that can occur after large-scale nuclear war. Firestorms from detonations loft hundreds of millions of tons of soot into the stratosphere, blocking sunlight and dropping surface temperatures by 20–40°F for months or even years.
The nuclear winter effects are catastrophic, including massive agricultural collapse, widespread famine, ozone depletion, and surges in UV radiation harming human health and ecosystems. Models of nuclear war climate impact suggest that even a limited exchange of nuclear weapons could create ice-age-like conditions in affected regions, demonstrating the global scale of this threat. Awareness of these potential consequences is critical for policy, disaster planning, and understanding long-term survival scenarios.
