"Sleep problems endanger health and quality of life for up to 45% of the world's population," according to the World Sleep Society.

世界睡眠协会称：“睡眠问题危及世界上45%的人口的健康和生活质量。”

youdao

The most important of all the great world problems which face us at the present time is the rapidly increasing pressure of population on land and on land resources.

我们现在面临的所有重大世界性问题中最重要的问题就是人口对土地和土地资源的压力正在迅速增长。

youdao

World population is growing at an unprecedented rate, and this increase in population only exacerbates these problems.

世界人口正在以一个前所未有的速度增长，而人口的增加又恶化了上述问题。

youdao

Across the world climate change is set to exacerbate problems where poor land use and population pressure is already putting an immense strain on finely balanced ecologies.

CNN: Desertification: How to stop the shifting sands

Because when you educate a girl you educate a family, reduce over-population, reduce disease, reduce pollution and environmental impact, reduce terrorism and a whole host of other world problems.

FORBES: Should They Ban The Girl Epidemic?