world population trends

基本解释

With the aging of world population trends in the intensification of the aging phenomenon has become a major strategic issue.
随着世界人口老龄化趋势的加剧，老龄化现象已成为全球性重大的战略问题。
If those trends hold in the future, the researchers estimate that half the world's population could face a climate-induced food crisis by 2100.
如果那些趋向将来停止的话，研究人员估计：到2100年世界上一半人口将面临气候导致的粮食危机。
Chapter 2 introduces the recent situation of aging population in the world, especially in china. It also forecasts the trends of aging in the 21st century.
第二章介绍世界人口老龄化的现状和趋势，及中国人口老龄化的突出特点，预测了中国在21世纪前半叶的人口老龄化趋势。

In the 1940s and 1950s, by extending the trends of population growth and food production, it was scientific fact that the world was on a collision course with massive starvation.
FORBES: Long-Term Forecasts Are Mostly Worthless