World Population Ageing 1950-2050
Something significant is happening to the world population-it is aging. The median (中位数的) age of an American in 1950 1 (be) 30-today it is 41 and is expected 2 (increase) to 42 by 2050. People tend to focus on the first factor. However, greater attention should 3 (place) on...
This chart shows how much the world’s population grew between 1900 and 2000, and how much experts believe it will grow by 2025. The numbers are in billions. When was the population under 2 billion A. In 1.900 B. In 1925 C. In 1950 ...
相关知识点: 试题来源: 解析 45%【答案】45%【核心短语/词汇】developing countries发展中国家【翻译】1950年,世界上百分之多少的人口住在发展中国家?【解析】根据课文内容,1950年,世界上百分之45的人口住在发展中国家。所以答案为45%。 反馈 收藏
Why has population growth been dropping since the 1960s? A variety of explanations factor into this, including: Falling fertility rates: Birth rates tend to fall as nations get richer. First, this happened in the developed world, but as the century progresses this phenomenon will impact more an...
World Population Ageing 1950-2050 xxviii Population Division, DESA, United Nations 1. Population ageing is unprecedented, without parallel in the history of humanity. Increases in the proportions of older persons (60 years or older) are being accompanied by declines in the proportions of the young...
In the early 1800’s, 45% of all children died before their 5th birthday. The life expectancy of the world population in 1950 was 45 years. In 1800, 90% of people lived in extreme poverty. One thing that looking at our world in data has taught m...
many women have five or more children.In 1950,around one quarter of the world's population lived in the developed countries.By 2050,these countries will be home to only around one tenth of the world's people.In the developing countries,more than one billion people already live below the ...
城市农场Though there will be 10 billion() people in 2055 in the world, the population isn't the only problem with getting enough food.In 1950, there were many more farms around the world. Farms grew the food that we ate. As cit-ies get bigger and bigger, there are fewer farms now....
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