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  3. A very important world problem is the increasing number of people who actually inhabit this planet. The limited amount of land a

A very important world problem is the increasing number of people who actually inhabit this planet. The limited amount of land a

admin2012-02-29  90
问题     A very important world problem is the increasing number of people who actually inhabit this planet. The limited amount of land and land resources will soon be unable to support the huge population if it continues to grow at its present rate.
    So why is this huge increase in population taking place? It is really due to the spread of the knowledge and practice of what is becoming known as "Death Control". You have no doubt heard of the term "Birth Control". "Death Control" is something rather different. It recognizes the work of the doctors and scientists who now keep alive people who, not very long ago, would have died of a variety of then incurable diseases. Through a wide variety of technological innovations that include farming methods and the control of deadly diseases, we have found ways to reduce the rate at which we die. However, this success is the very cause of the greatest threat to mankind.
    If we examine the amount of land available for this ever-increasing population, we begin to see the problem. If everyone on the planet had an equal share of land, we would each have about 50,000 square metres. This figure seems to be quite encouraging until we examine the amount of usable land we actually have. More than three-fifths of the world’s land cannot produce food.
    Obviously, with so little land to support us, we should be taking great care not to reduce it further. But we are not! Instead, we are consuming its "capital" — its nonrenewable fossil fuels and other mineral deposits that took millions of years to form but which are now being destroyed in decades. We are also doing the same with other vital resources not usually thought of as being nonrenewable such as fertile soils, groundwater and the millions of other species that share the earth with us.
    It is a very common belief mat the problems of the population explosion are caused mainly by poor people living in poor countries who do not know enough to limit their reproduction. This is not true. The actual number of people in an area is not as important as the effect they have on nature. Developing countries do have an effect on their environment, but it is the populations of richer countries that have a far greater impact on the earth as a whole.
According to the passage, many people tend to believe that______.
选项 A、lowering the birth rate doesn’t make any sense
B、it is wealth countries that should practice birth control
C、it’s wrong to artificially prolong people’s lives
D、poor countries are to blame for the harm to nature
答案D
解析 根据题干中的believe将本题出处定位到第五段首句。该句提到，有一种很普遍的观点，认为人口爆炸所带来的问题主要是由生活在贫困国家的穷人造成的。该段末句提到，发展中国家确实对他们的环境有所影响，但总体而言，带来了更大影响的是富裕国家的人口。结合首句可知，人们会认为人口爆炸造成的环境破坏问题应由贫困国家而不是富裕国家负责，故答案为[D]。[A]是针对poor people．．．do not know enough to limit their reproduction设的干扰项；[B]是针对该段末句的后半句设的干扰项；[C]在文中未提及。
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