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The Environment in Perspective: Is Everything Getting Steadily Worse? Much of the discussion of environmental problems in the popular press leaves the reader with the impression that matters have been growing steadily worse, and that pollution is largely a product of the profit system and modern industrialization. There are environmental problems today that are both enormous and pressing, but in fact pollution is nothing new. Medieval cities were pestholes—the streets and rivers were littered with garbage and the air stank of rotting wastes. At the beginning of the eighteenth century, a German traveler reported that to get a view of London from the tower of St. Paul's, one had to get there very early in the morning 'before the air was full of coal smoke.' Since 1960 there has been progress in solving some pollution problems, much of it the result of concerted efforts to protect the environment. The quality of the air in most Canadian cities has improved. In Toronto, for example, the concentration of suspended particulates, or soot, in the air has fallen dramatically since 1962. To put this figure in perspective, it should be noted that the current health advisory level for the index is 32. At a level of 58, people with chronic respiratory diseases may be affected. At 100, even healthy people may be affected by prolonged conditions, and those with cardiac and respiratory diseases could suffer severe effects Recently in Toronto, the index has exceeded 32 on fewer than half a dozen days annually. Similar improvements have occurred elsewhere in Canada and in other industrialized countries. Even the famous, or rather infamous, 'fogs' of London are almost a thing of the past. There have been two high readings of particular note in the British capital in 1959 (when the index rose to 275 and there was a 10 percent increase over the normal number of deaths) and in 1962 (when the index rose to 575 and there was a 20 percent increase in mortality ). But more recently, London's, cleaner air has resulted in an astounding 50 percent increase in the number of hours of winter sunshine. In short, pollution problems are not a uniquely modem phenomenon, nor is every part of the environment deteriorating relentlessly. Environmental problems do not occur exclusively in capitalist economies. For example, in the People's Republic of China, coal soot from factory smokestacks in Beijing envelops the city in a thick black haze. Similarly, smoke from brown-coal furnaces pollutes the air almost everywhere in Eastern Europe. It has been estimated that a third of Poland's citizens live in areas of 'ecological disaster'. The citizens of Leipzig, a major industrial city in what was formerly East Germany, have a life expectancy a full six years shorter than the national average. However, we do not mean to suggest that all is well with the environment in market-oriented economies or that there is nothing more to do. While there have been some improvements, serious problems remain. Our world is now subject to a number of new pollutants, most of which are far more dangerous than those we have reduced, even though they may be less visible and less malodorous While environmental problems are neither new nor confined only to capitalist, industrialized economies, these facts are not legitimate grounds for complacency. The potential damage that we are inflicting on ourselves and on our surroundings is very real and very substantial.
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举一反三
【多选题】影响迁移的客观因素包括()。
A.
学习材料的特性
B.
教师的指导
C.
学习的心向和定势
D.
学习情境的相似性
E.
迁移的媒体
【单选题】下列选项中不属于细分消费者市场的心理变量是( )。
A.
个性
B.
家庭人口
C.
社会阶层
D.
生活方式
【单选题】下列会计科目中属于负债类科目的是()
A.
待摊费用
B.
资本公积
C.
待处理财产
D.
损溢预提费用
【多选题】影响迁移的客体因素包括:
A.
学习者的概括能力
B.
学习者的迁移心向
C.
教师的指导
D.
学习情境的相似性
E.
学习材料的相似性
【单选题】下列会计科目中属于负债类会计科目的是()
A.
应付账款
B.
固定资产
C.
实收资本
D.
应收账款
【单选题】下列会计科目中属于负债类科目的是( )。
A.
销售费用
B.
资本公积
C.
应收账款
D.
预收账款
【单选题】下列选项中不属于细分消费者市场的心理变量是( )。
A.
购买类型
B.
家庭人口
C.
社会阶层
D.
生活方式
【多选题】在牛胚胎移植中经常会使用 哪 两 类激素( )
A.
生长素
B.
抗利尿素
C.
促卵泡素
D.
促黄体生成素
【单选题】下列会计科目中属于负债类科目的是()。
A.
待摊费用
B.
待处理财产损溢
C.
预提费用
D.
资本公积
【多选题】下列会计科目中属于负债类会计科目的是()。
A.
所得税费用
B.
预收账款
C.
应付票据
D.
短期投资跌价准备
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