2. 考研
  3. Of greatest interest to those concerned with the environmental aspects of solid waste management is the issue of—and the need fo

Of greatest interest to those concerned with the environmental aspects of solid waste management is the issue of—and the need fo

admin2014-06-13  48
问题     Of greatest interest to those concerned with the environmental aspects of solid waste management is the issue of—and the need for—resource recovery and recycling. To many Americans, there is perhaps no greater symbol of our imbalance with nature and our mal-adaptation to its realities than the fact that we discard millions of tons of wastes every year which do, in act, have value. The American people realize now that trash need not be mere junk. It has the potential of becoming a significant vein or resources, a mother lode of opportunity for men of vision who can see beyond the horizon.
    The American people are right. And those who serve them can no longer view solid waste management solely in terms of collection and disposal. However, something more than the magic of science and technology is required to convert all this waste back into useful resources.
    In fact, in proportion to consumption, resource: recovery has been steadily losing ground in recent years in virtually every materials sector. Approximately 200 million tons of paper, iron, steel, glass, nonferrous metals, textiles, rubber and plastics flow through the economy yearly—and materials weighing roughly the same leave the economy again as waste. In spite of neighbor hood recycling projects, container recovery depots, paper drives, anti-litter campaigns, local ordinances banning the non-returnable bottle, and file emergence of valuable new technological approaches, only a trickle of the "effluence of affluence" is today being diverted from the municipal waste stream.
    The principal obstacles are economic and institutional, not technological. The cost of recovering, processing and transporting wastes is so high that the resulting products simply cannot compete, economically, with virgin materials. Of course, it the true costs of such economic "externalities" as environmental impact associated with virgin materials use were reflected in production costs and if there were no subsidies to virgin materials in the form of depletion allowances and favorable freight rates, the use of secondary materials would become muck more attractive. But they are not now. There are no economic or technical events on the horizon, short of governmental intervention, that would indicate a reversal of this trend. If allowed to continue to operate as it does now, the economic system will continue to select virgin raw materials in preference to wastes. This fact should be etched into the awareness of those who look to recycling as a way out of the solid waste management dilemma.
选项 A、requires further research
B、is available now
C、remains to be developed
D、is still being experimented
答案B
解析 推断题。题意为："从文中可推断出回收固体垃圾的科学方法______"。根据文章第三段末句(尽管附近有回收项目，容器再生储存站、纸张收集处、反对随处扔垃圾运动，禁止使用不可回收瓶的地方法规，以及宝贵的新技术方法的出现…)，可知选项"现在可获得"为正确答案。
转载请注明原文地址:https://www.kaotiyun.com/show/l0O4777K
0

考研英语一

相关试题推荐
随机试题
最新回复(0)