핵전쟁 대비.
2023 the earth's population 8 billion –minus, nuclear war, 5 billion = earth's population 3 billion. 2022 aug 16. / Bloomberg. 핵전쟁 발생시 50억명 사망, 인류 70% 전멸. (In the event of a nuclear war, 5 billion people were killed and 70% of humanity was wiped out.) https://www.bloomberg.com/news/articles/2022-08-15/five-billion-face-death-in-full-scale-nuclear-war-study-shows ---------------------------------..