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Study Shows Nuclear Winter Could Slash Corn Yield by Up to 87% and Outlines Seed Kit Plan

UNITED STATES, JUL 21 – Penn State study shows nuclear war could reduce global corn yields by up to 80%, risking widespread famine and food system collapse, researchers warn.

  • Researchers at Penn State University published a study in Environmental Research Letters modeling nuclear winter impacts on global corn production.
  • The study analyzed scenarios where nuclear war injects soot into the atmosphere, blocking sunlight and disrupting climate systems.
  • A large-scale nuclear war could reduce sunlight sharply, causing an up to 80% decline in corn yields and a regional war a 7% drop.
  • Yuning Shi stated switching to crop varieties that tolerate cooler, shorter growing seasons could increase global crop production by 10%.
  • The study highlights the fragility of the biosphere, urging preparedness and investment in climate-resilient agriculture to prevent catastrophic food crises.
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Phys.org broke the news in United Kingdom on Monday, July 21, 2025.
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