Traditionally, it was believed that the transition to agriculture was the result of a worldwide population crisis.

传统上，人们认为全球人口危机促使人们向农业转型。

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The idea of a world population crisis is therefore unlikely, although population pressure might have arisen in some areas.

尽管在一些地区可能出现了人口压力，世界人口危机是不太可能发生的。

youdao

Yet 50 years ago Japan faced a demographic crisis of another sort: a population explosion.

在50年前，日本却面临着另一个人口危机：人口激增。

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"We estimate that almost half of the Somali population, 3.7 million people, are affected by this crisis and a full 2.8 million people live in the south, the most seriously affected area.

VOA: special.2011.07.23

Or sheer narcissism that perpetuates the population crisis?

FORBES: Planet Under Siege: Family Planning Critics Soon To See Global Population Reach 7,000,000,000

New York City had escaped a debt crisis but found itself in a crime, population, and educational crisis that would last for decades.

FORBES: Why The Lessons Of New York City's Debt Crisis Won't Help Greece

One of the most extraordinary episodes of American political history has played itself out before a surprisingly calm public: most polls showed that barely a quarter of the population deemed it a crisis.

ECONOMIST: The end, at last