9. The World Population Explosion
The human race has experienced a consistent increase in population since the beginning of its history. Famine and disease have done little to offsetthis 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 worlds 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. 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.
不可数名词与可数名词的转化
表示原因关系的连词
情态动词表示推测的用法
集合名词分类用法详解
will和would的区别
表示转折或对比
集合名词audience的用说明
newspaper可数吗
英语名词的格及其用法
连词的概念
Water使用复数形式的若干场合
need和dare的区别
名词walk可数吗
英语集合名词用法说明
名词ability的用法
and 和 or 的区别
比较can 和be able to
情态动词的回答方式
浅谈名词的可数性及其修饰语
表示"一…就…"的结构
have to和must的比较
cattle还是cattles
谈谈world的语法特点
说说名词bed
比较may和might
名词aunt和uncle用作称呼的两点说明
should 和ought to的区别
名词beer可数吗?
表示选择的并列结构
小议名词birthday的用法
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