Five hundred years ago,the population of the world was about 460 million.In 1900,the world's population was under 2 billion (十亿).Right now it is doubling every 40 years.That means,if this rate of growth continues,when you are a parent,there will be twice as many people on earth as...
Why is the world's population growing? The answer is not what you might think. In 1900, people died at the average (平均的) age of 30. By 2000 the average age was 65. But while increasing health was obvious of the 20th century, declining (下降的) birth rate could be more obvious ...
In 1900 the population of Bangladesh was around 29 million people. By 1950 it had grown only slightly to 38 million. But then things changed. Between 1950 and 2000 the population of Bangladesh increased with 92 million people to 130 million corresponding to a 341 percent increase. From 2000 t...
The reason for the explosion is not that people _1_(reproduce) like rabbits, but that people have stoppe d _2(drop)de a d like flies. In 1900, people die d _3 the average age of 30. By 2000 the average age was 65. But while increasing health was a_4 ( type)feature of the ...
The population clock never stops ticking--there are already 6.4 billion of us and the latest estimates predict around 9.3 billion by 2050. Yet back in 1900, world population was just 1.6 billion. So what has driven this period of startling growth?
have been reproducing like rabbits,but that people have stopped dropping dead like flies.In 1900,people died at the average age of 30.By 2000 the average age was 65.But while increasing health was a typical feature of the 20th century,declining birth rate could be a defining one of the ...
In 1900, people died at the average age of 30. By 2000 the average age was 65. But while increasing health was a typical feature of the 20th century, declining birth rate could be a2 B one of the 21st.Statistics show that the average number of births per woman has fallen from4.9 in...
What was the Age of Imperialism characterized by? What is the Apartheid Era? What was England like in the early 1900s? What is protectorate imperialism? What was the first colonial newspaper? What was the major economy of the middle colonies?
Population Change Why is the world’s population growing The answer is not what you might think. The reason for the explosion is not that people have been reproducing like rabbits, but that people have stopped dropping dead like flies. In 1900, people died at the average age of 30. By ...
Toward the 19th century,scientists found they needed to protect the animals, 9 they created national parks. The first national park in the world was Yellowstone. 10 ,now there are more than 100 national parks in 120 countries to protect animals. ...