Nuclear winter.
D000818:Animals; D003081:Cold Climate / Q000009:adverse effects*; D004391:Dust / Q000009:adverse effects; D004463:Ecology; D006801:Humans; D009689:Nuclear Warfare; D011848:Radioactive Pollutants / Q000009:adverse effects; D012906:Smoke / Q000009:adverse effects; D013217:Starvation / Q000209:etiology
D004391:Dust; D011848:Radioactive Pollutants; D012906:Smoke