The continued existence of nuclear weapons implies a risk to life on Earth not just from the immediate effects of the war. Adverse indirect environmental and societal consequences of sudden climate change due to a potential nuclear conflict—especially for food production systems
The smoke from a single fire would not produce detectable climate impacts, but cumulative emissions from many fires generating several teragrams of soot could substantially absorb sunlight in the stratosphere, so that less energy reaches the Earth’s surface, cooling it for about a decade
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