单项选择题

The number of people in the world is growing. By the year 2000 world populathm is expected to grow to 6.2 billion. The fastest growth is in developing countries, where there is already a shortage of food, housing, and jobs. Africa is the fastest-growing part of the World. In Kenya, for example, the population will increase 10 times in the next 80 years.
In Asia, a few countries have begun to reduce their population growth slowly. China still makes up about 21% of the world’s population, but it has greatly slowed down its rate of growth. It is now growing at a rate of only 0.8% per year. In India, however, the population continues to grow, and it is expected to be even larger than the Chinese population by the year 2040. The population in India is growing three times faster than in. Australia, Japan, and the developed countries in Europe. In fact, European people are more worried about population decrease than increase. Eastern Europe- an countries are growing at a rate of only about 1%.
The best news is that, in general, population growth has slowed down--from2.08% in 1970 to 1.6% in 1985. At the present rate, the earliest time that the world could reach zero population growth is 2040. At that time, there will probably be about eight billion people in the world.’ It is possible, though, that the population might not really stop growing until much later. With people living longer, the number of elderly will have grown by 15% by that time. Nearly haft of the world’s population will be living in cities. This is a situation that could cause a long list of other problems including pollution and a lack of food, water, housing, and jobs.

Which of the following facts is best supported by the text().

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