| gptkbp:instanceOf | gptkb:logic 
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                                | gptkbp:cause | firestorms soot from nuclear explosions
 
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                                | gptkbp:concerns | mass extinction global famine
 
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                                | gptkbp:contrastsWith | volcanic winter asteroid impact winter
 
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                                | gptkbp:debatedBy | gptkb:learned_society 
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                                | gptkbp:describes | climatic effect of nuclear war 
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                                | gptkbp:effect | global cooling agricultural collapse
 reduced sunlight
 
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                                | gptkbp:featuredIn | gptkb:Nuclear_Winter:_The_Evidence_and_the_Risks_(report) gptkb:The_Cold_and_the_Dark_(book)
 
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                                | gptkbp:firstDescribed | 1983 
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                                | gptkbp:impact | human survival food production
 ecosystems
 
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                                | gptkbp:influenced | nuclear disarmament debates public policy on nuclear weapons
 
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                                | gptkbp:modeledAfter | computer simulations 
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                                | gptkbp:potentialConsequenceOf | thermonuclear war large-scale nuclear exchange
 
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                                | gptkbp:proposedBy | gptkb:Carl_Sagan gptkb:James_Pollack
 gptkb:Owen_Toon
 gptkb:Richard_P._Turco
 gptkb:Thomas_Ackerman
 
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                                | gptkbp:publishedBy | gptkb:Carl_Sagan 
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                                | gptkbp:relatedTo | gptkb:nuclear_test gptkb:disaster_response
 nuclear war
 volcanic winter
 
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                                | gptkbp:studiedBy | climate models climatologists
 atmospheric scientists
 historical analogs
 
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                                | gptkbp:subjectOf | gptkb:academic_journal documentaries
 policy discussions
 
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                                | gptkbp:bfsParent | gptkb:Alvarez_hypothesis_(dinosaur_extinction_by_asteroid_impact) 
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                                | gptkbp:bfsLayer | 5 
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                                | https://www.w3.org/2000/01/rdf-schema#label | nuclear winter 
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