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.
隨著世界人口老齡化趨勢的加劇，老齡化現象已成爲全球性重大的戰略問題。
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.
如果那些趨曏將來停止的話，研究人員估計：到2100年世界上一半人口將麪臨氣候導致的糧食危機。
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.
第二章介紹世界人口老齡化的現狀和趨勢，及中國人口老齡化的突出特點，預測了中國在21世紀前半葉的人口老齡化趨勢。

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