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。

youdao

They are known as Asian Carp and the explosion of their population in the Illinois River is a concern to large-river ecologist Kevin Irons.

VOA: standard.2010.07.20

Moreover, the likelihood of a population explosion appears to be receding.

ECONOMIST: A Survey of the 20th Century

There is a population explosion in Nepal.

CNN: Going Nowhere

Is the human population explosion a mere pretext for biological profiteering?

FORBES: A Call to Agricultural Action