The World Population Explosion
正确答案：
The human race has experienced a consistent increase in population since the
beginning of its history. Famine and disease have done little to offset(抵消) this
steady increase. Too many people are added annually to the population of the
world. So both the causes of population increase and the results of having more
people are worth careful study.Culture evolution is the major factor responsible
for population increase.Early in human development, people invented tools to
hunt animals. Later they built shelters to protect themselves. Step by step,
they made life easier. As a result, fewer died from natural forces, such as
harsh climate and disease.In the past, when population grew, there was
unexplored territory to inhabit. But now, almost all the habitable land has been
explored.The world's population may reach 8.7 billion in 2033. It is clear that
world population is a serious issue that needs careful attention. Human beings
are unique to solve problems through cultural evolution.( 发展)Facing the world
population explosion in the near future. We must carry out the birth control
program in order to save the mankind and save the world.
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