Additional social stresses may also occur because of the population explosion or problems arising from mass migration movements—themselves made relatively easy nowadays by modern means of transport.

由于人口的猛增或大量人口流动（现代交通工具使这种流动相对容易）造成的种种问题也会对社会造成新的压力。

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With the population explosion in the city and decrease of land resources, using land in stereoscopic form has become a general trend all over the world.

随着城市人口的快速增长和土地资源的日趋稀缺，以立体方式利用土地，已成为世界范围的普遍趋势。

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Additional social stresses may also occur because of the population explosion problems arising from mass migration movements—themselves made relatively easy nowadays by modern means of transport.

由于人口的猛增或大量人口流动（现代交通工具使大量人口流动变得相对容易）所造成的种种问题也会增加社会压力。

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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

But he pooh-poohs any suggestion that global warming might have something to do with the population explosion.

BBC: Parakeet in a London garden

Ehrlich insisted that commodities would become more expensive: they were running out in the face of the population explosion.

FORBES: But Why Did Julian Simon Win The Paul Ehrlich Bet?

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

FORBES: A Call to Agricultural Action