首页
登录
职称英语
If you live in a city in North America or Europe, you have probably never t
If you live in a city in North America or Europe, you have probably never t
游客
2023-08-30
27
管理
问题
If you live in a city in North America or Europe, you have probably never thought much about water. Whenever you need some, you turn on the tap and there it is. Millions of people in other parts of the world are not so lucky. They have trouble getting enough clean water for their basic needs. This situation may soon become common all around the world, scientists believe. In fact, they say that the lack of clean water may be one of the biggest issues in the twenty-first century.
The reasons for this are clear. On the one hand. people are using more water than ever before. Over the last fifty years, the population of the world has more than doubled. On the other hand, many sources of surface water such as rivers, lakes, and streams are too polluted and unhealthy for use as drinking water.
This has forced more and more people to drill wells so they can get water form underground. There are enormous amounts of water deep underground in lakes called aquifers. Until recently, scientists believed this underground water was safe from pollution. Then, in the 1980s. people in the United States began to find chemicals in their well water, and scientists took a closer look at what was happening. Weldon Spring, Missouri, for example, was the site of a bomb factory during World War Ⅱ. The factory was destroyed after the war. but poisonous chemicals remained on the ground. Very slowly, these chemicals dripped down through the ground and into the aquifer. Once they did, however, the water form that aquifer was no longer drinkable.
It probably never will be drinkable again, Underground water is not renewed regularly by the rain, like lake or river water. Thus, if a harmful chemical gets into an aquifer, it will stay there for a very long time. Furthermore, it is nearly imp6ssible to remove all the water in an aquifer and clean out the pollutants.
Industrial sites like Weldon Spring are one cause of underground water pollution. There are thousands of such sites in the United States alone, and many others around the world. Underground water pollution is also caused by modern farming methods, which require the use of large amounts of chemicals in the fields. And finally, yet another important cause of underground water pollution is waste. That includes solid waste thrown away in dumps and landfills, and also untreated human and animal waste.
The situation is indeed very serious. Fortunately, there are many aquifers and they are very large. Only a small number have been seriously damaged so far. But if the world does not want to go thirsty in the near future, further pollution must be prevented. Around the world, governments must make real changes in industry, agriculture, and waste disposal. [br] In Weldon Spring, people found ______.
选项
A、chemicals in well Water
B、many sources of surface water
C、more aquifers than other places
D、chemicals in the bomb factory
答案
A
解析
细节题。第三段中的“people in the United States began to find chemicals in their well water,...Weldon Spring,...,for example,..”说明美国科学家发现Weldon Spring这些地方的井水里有化学物质。因此正确答案为A项。
转载请注明原文地址:https://tihaiku.com/zcyy/2971245.html
相关试题推荐
[originaltext]M:HowdidyoulikeourAmericanHistoryclassyesterday?W:Well
[originaltext]M:HowdidyoulikeourAmericanHistoryclassyesterday?W:Well
FreshwatersuppliesinAsiaandsouthAmericaisdisappearingastheglaciersm
FreshwatersuppliesinAsiaandsouthAmericaisdisappearingastheglaciersm
FreshwatersuppliesinAsiaandsouthAmericaisdisappearingastheglaciersm
FreshwatersuppliesinAsiaandsouthAmericaisdisappearingastheglaciersm
OnDecember25,2000,manypeopleacrossNorthAmericareceivedarareChrist
ThecounselorwarnedBrianandCherythattheywouldnolongerbeAmericancitiz
ThecounselorwarnedBrianandCherythattheywouldnolongerbeAmericancitiz
ThecounselorwarnedBrianandCherythattheywouldnolongerbeAmericancitiz
随机试题
TopuniversitiesinChinashouldbeevaluatedbasedontalentcultivationandsc
根据《公路工程标准施工招标文件》(2018年版)第八章“工程量清单计量规则”第1
设f(t)=t+cost+e2t,则=()。
卡马西平属于哪一类抗癫痫药A.苯二氮类 B.二苯并氮革类 C.丁酰苯类 D
“眼观六路,耳听八方”说的是( )A.注意的稳定性和范围 B.注意的分配与集
以初中物理“二力平衡”为例,简述三种新课导入的方法。
下列关于地基处理方法适用范围的论述,其中何项是不正确的? (A)换填垫层法适
下列关于中国电影著作权协会的性质描述正确的是( )。A.营利性机构 B.著作
下列关于资产可收回金额的估计,表述正确的有( )。A.资产公允价值减去处置费用后
企业生产车间(部门)和行政管理部门等发生的固定资产修理费用等后续支出应分别计入制
最新回复
(
0
)