问答题
You will read a table showing desertification in a region. Write a composition of no less than 120 words to describe the trend of the changes, the possible causes and effects, and some effective solutions for these changes on the Answer Sheet.
【正确答案】正确答案: Desertification It is shown in the table that during the past two decades from 1980s to 2000s, there was a dramatic rise in the size of desertification area from 560 square kilometers to 980 square kilometers in the region mentioned, with the frequency of sandstorm soaring from 8 to 16. It can be predictably concluded that with no feasible measures to combat the alarming degradation of land, people"s life will be under great threat. Human beings are the master architect of land desertification. On the one hand, conducted by the poor farming methods, people continually plant crops in the same place and graze year after year on the same grassland, which remove fertile topsoil and result in the loss of planting area. On the other hand, tempted by the huge profits, the masses deforest the region for fuel and construction material and the rate of erosion and runoff increases exponentially with decreased vegetation cover. Techniques exist for mitigating or reversing the effects of desertification. First, the government should establish such laws as law of soil and water conservation to restrain people"s wrongdoings and keep the balance of the nature. More practically, the authority ought to increase the funding of anti-desertification to develop the needed technology and build shelterbelt. Besides, we should enhance people"s awareness of environmental protection to effectively decrease the over-exploitation of energy and over-land reclamation.
【答案解析】