A nuclear war would disrupt the global climate so badly that billions of people could starve to death, according to what experts are calling the most expansive modeling to date of so-called nuclear winter.
Although the exact effects remain uncertain, the findings underscore the dangers of nuclear war and offer vital insights about how to prepare for other global disasters, researchers say.
For decades, scientists have warned a similar catastrophe could follow a nuclear war, as fires ignited by hundreds or thousands of nuclear explosions would release millions of tons of soot, blocking sunlight and inducing global environmental effects. Worries about climate effects of nuclear warfare emerged soon after World War II, and studies took off during the Cold War.
—leaving an estimated 5 billion dead from the famine, the researchers report. A worst-case war between India and Pakistan could drop calorie production to 50% and cause 2 billion deaths. The team tried to simulate the impact of food-saving emergency strategies, such as converting livestock feed and household waste to food. But in the larger war scenarios, those efforts did little to save lives.
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