----- Nội dung ảnh ----- The dramatic growth of the world's population in the twentieth century has been, without parallel in human history. Most of this growth had occurred since 1950 and is known as the population explosion. Between 1950 and 1980, the world's population increased from 2 to over 4 billion, and by the end of the twenty century, the figure had risen to about 6.6 billion. Growth of this size cannot continue indefinitely. Recent forecasts suggest that the total population will level out between 8 and 9 billion in the mid twenty first century. Already there are encouraging signs that the rate of increase in many less developed countries is beginning to slow down.
36. How was the growth of the world's population in the twentieth century? 37. When had the population explosion occurred? 38. How did the world population increase between 1950 and 1980? 39. What was the world's population in 2000? 40. according to the recent forecasts, how will the total population be in the mid twenty first century?
