Similar tensions exist between the developed and the developing nations. Many people in industrialized nations, for example, believe that developing nations in tropical regions should do more to protect their rain forests and other natural areas. But the developing countries may be impoverished(困), with populations growing so rapidly that using the land is a means to temporarily avoid worsening poverty and starvation.
Many of the changes to Earth that concern scientists have the potential to rob the planet of its biological richness. The destruction of Earth’s ozone layer(臭氧层), for example, could contribute to the general process of impoverishment by allowing ultra – violet rays to harm plants and animals. And global warming could wipe out species unable to quickly adapt to changing climates. Clearly, protecting Earth’s biological diversity is a complex problem. But solutions to humanity’s current problems will come only through coordinated international efforts to control human population, stabilize the composition of the atmosphere, and preserve intact Earth’s complex web of life.
1.Why does the author say that the protection of endangered species is a highly controversial issue?
A) Because people can’t agree as to what species to protect.
B) Because it is difficult to find an effective way to protect such species.
C) Because it affects the interests of certain groups of people.
D) Because it is a major problem involving a series of legal procedures.
2. According to the passage, the preservation of rain forests ______.
A) may hamper a developing country in its fight against poverty
B) benefits developed countries rather than developing countries
C) should take priority over the control of human population
D) will help improve the living conditions in developing countries
3. According to the passage, cutting trees to grow more food ______.
A) will widen the gap between the developed and the developing countries
B) is but a short – term relief to the food problem
C) can hardly alleviate the shortage of food
D) proves to be an effective way out for impoverished nations
4. Among “humanity’s current problems” (Line 5, Para.3), the chief concern of the scientists is ______.