The year 2005 is the midpoint of a decade that spans threeunique, important transition in

The year 2005 is the midpoint of a decade that spans three

unique, important transition in the history of humankind. 【S1】______

Before 2000, young people always outnumber old people. 【S2】______

From 2000 forward, old people will outnumber young

people. Until approximately 2007, rural people will have

always been outnumbered urban people. From approximately 【S3】______

2007 forward, urban people will not outnumber rural people.

From 2003 on, the median woman worldwide have had, and

will continue to have, too few or just enough children

during her lifetime to replace themselves and the father in 【S4】______

the following generation.

The century with 2000 as its midpoint marks three

additional unique, important transitions in human history.

First, any person who died before 1930 had lived through 【S5】______

a doubling of the human population. Nor is any person

born in 2050 or later likely to live through a doubling of

the human population. On contrast, everyone 45 years old 【S6】______

or elder today has seen more than a doubling of human 【S7】______

numbers from three billion in 1960 to 6.5 billion in 2005.

The peak population growth rate ever reached about 2.1

percent a year, that occurred between 1965 and 1970. Human 【S8】______

population never grew with such the speed before the 20th 【S9】______

century and is never again likely to grow with such speed.

Our descendants will look back on the late 1960s peak like 【S10】______

the most significant demographic event in the history of

the human population even though those of us who lived

through it did not recognize it.

【S1】