The threat of nuclear war has diminished.

核战的威胁变小了。

《柯林斯英汉双解大词典》

The Chrysalids tackles the idea of genetic mutation, possibly caused by nuclear war, and the Kraken Wakes tells of a world drowned by rising sea levels.

《蛹》提出了可能缘于核战争的基因变异这个话题；而在《海龙苏醒》中，海平面不断上升导致了世界被淹没。

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If you read the citation which the National Academy of Science gave me," he said pointing to a plaque on the wall, "they think it helped avoid nuclear war."

你看过国家科学院给我的奖状没有，”他指着墙上的一块牌匾说，“他们认为它有助于避免核战争。”

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Years of worry that the same rockets that could take people to the moon could also bring nuclear war to Earth.

VOA: special.2009.08.16

Today's nuclear threat differs from that of the Cold War, according to U.S.Secretary of State Hillary Clinton, "The threat of nuclear war, nuclear attack that we grew up with in the Cold War has diminished.

VOA: standard.2010.04.11

North Korea says new U.N.sanctions could bring about war on the Korean peninsula and will not slow its nuclear program.

VOA: standard.2009.06.14

Lastly, there is the possibility of a nuclear war triggered by something other than a state.

ECONOMIST: The ostrich��s view of the world

Starting in the 1950s, paralleling the Korean War, was the increasing risk of nuclear war.

FORBES: What Happened To The American Declaration Of War?

Asteroid strikes and nuclear war are, from memory, two of the examples he uses.

FORBES: Nature on Uncertainty: Climate Change is Less Important Than We Thought