1. nuclear winter
Wikipedia definition
2. Nuclear winterNuclear winter is a hypothetical climatic effect of nuclear war. It is theorized that detonating large numbers of nuclear weapons has a profound and severe effect on the climate causing cold weather and reduced sunlight for a period of months or even years, especially over flammable targets such as cities, where large amounts of smoke and soot would be ejected into the Earth's stratosphere.
Read “Nuclear winter” on English Wikipedia
Read “核の冬” on Japanese Wikipedia
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