If the population of the earth goes on increasing at its current rate, there will eventually not be enough resources left to sustain life in the planet. By the middle of the 21 st century, if present trends go on, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on the earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Cart Sagan.
Sagan believes that before the earth’s resources are completely exhausted it will be possible to change that atmosphere of Venus and so create a new world almost as large as the earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sag
A. we fire the rockets containing algae into the atmosphere of Venus
B. we change Venus temperature
C. we make it possible to rain on Venus
D. we change the atmosphere on Venus
In our population, which is now about 167 million, it is estimated there are more than 33 million people with I. Q. ’s below 90; it is a disturbing thought that these people will never, at any age, read much more than comic books, newspaper headlines, and the simplest of best sellers, nor will they be able to make intelligent judgments on any complicated, important national or international problem. The intellectuals, of course, are at the other end of the scale, they are people with I. Q. ’s of 130 or more, and there are slightly more than five million. From130 to the top of the scale, there are only 2.1 million people. Careful tests have shown that at least half of these high I.Q. people are never discovered, do not go to college, and live out their lives in humble, even though usually respected, occupations. The identified intellectual, therefore, will at best be only one person in 46, and is more likely to be one person in 150. It is not surprising that he feels a
A. intellectually, our population is not homogeneous
B. regardless of I. Q. , people must learn to live and work together
C. high-I. Q. people are inclined to be more critical than low-I. Q. people
D. people should constantly seek to improve their I. Q. levels
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