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a-2k-worlddukfacts.peperonity.net

World population facts

The US Census Bureau reported that
the 6 billionth person was born at
1.24am on Sunday July 18, 1999. The
United Nations however, had set that
landmark at October 12, 1999.
Every second 5 people are born and 2
people die, a net gain of 3 people. At
this rate, the world population will
double every 40 years and would be 12
billion in 40 years, 24 billion in 80
years, and more than 48 billion in 120
years. However the United Nations
estimate that world population will
stabilize at 12 billion in 120 years,
citing that effective family planning
will result in a universally low birth
rate. Education plays a key role: almost
half of the 6 billion people are under
age 25.
At the beginning of the second
millennium (1000 AD) the world
population was 400 million. In 1750
there were about 800 million people in
the world. In 1850 there were a billion
more, and by 1950, another billion.
Then it took just 50 years to double to
6 billion. In another 50 years the world
population is expected to be 9 billion,
which means that a decrease in
growth of the world population is
expected.
The recent global population explosion
is not only the consequence of
increased birth rates but also the
result of an unprecedented decrease
in death rate. Significant advances in
public health and medicine,
phenomenal agricultural yields and
the expanding global economy
contributed to the population
explosion as the lifespan average
continues to increase.
Only one in ten people lived in cities in
1900. By 1994 the figure had grown to
one of every two people, creating
megalopolies of millions to tens of
millions inhabitants. More than 400
cities have a population of more than a
million people. Managing such large
cities, and better management of the
planet’s resources, could become the
most difficult problem of this century.
In spite of the population increase and
desertification, famines have actually
become less frequent in the past 200
years. The...


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