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The chief causes of water shortage are population growth and water pollution.
A．Y
B．N
C．NG
答案
更多“The chief causes of water shortage are population growth and water pollution.A．YB．NC．NG”相关的问题
第1题
According to Peter H. Gleick, what is the chief cause of water shortage？
A. The diversion of the rivers.
B. The change of the climate.
C. The environmental pollution.
D. The growth of population.
第2题
1. According to the passage，in 2010 while output of food will be greater，_____.
A. people will have sufficient food supplies
B. the world resources will become more than enough
C. in most developing countries people will have less food than they have today
D. the living standards of the world's population will improve greatly
2. According to the author，in 2010 for many poor people，_____.
A. things will get even worse
B. things will be a little better
C. it will be necessary for them to improve their housing
D. it will be impossible to obtain enough necessities of life
3. In the 1970-2010 period，the large proportion of global increase of food production goes _____.
A. to 90 percent
B. to developing countries
C. to any country in the world that needs it
D. to those countries that already have high per head consumption
4. How does the author predict the development of new water supplies in the future_____
A. Water shortage will occur in some regions only.
B. Development of new water supplies will be more expensive.
C. The less developed countries need more water than the developed ones.
D. The demand for water will double with the growing population.
5. Which of the following may best serve as the title of this passage_____
A. The Future Problems in the World.
B. Water and Air Pollution.
C. Water and Food Shortages.
D. Food Production and Consumption.
第3题
听力原文： The need to feed a growing population is putting much pressure on the world's supply of water. With 97% of the world's water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage seems strange to someone fortunate enough to live in a high rainfall country, many of the world's agricultural industries experience constant water shortages.
Although dams can be built to store water for agricultural use in dry areas and dry seasons, the costs of water redistribution are very high. Not only is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water may flow easily through pipes to fields, but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.
This is particularly troubling for countries with agricultural industries in areas dependent on irrigation. In Texas, farmers' overuse of irrigation water resulted in a 25% reduction of the water stores. In the Central Valley area of southeastern USA, a huge water engineering project provided water for farming in dry valleys, but much of the water use has been poorly managed.
Saudi Arabia's attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.
Questions 32 to 35 are based on the passage you have just heard.
32. What is the passage mainly about？
33. What do we learn from the passage？
34. What can be learned from the passage？
35. What is most likely to be discussed next？
(33)
A．Water supply and increasing population.
B．Water use management and agriculture.
C．Water redistribution and wildlife protection.
D．Water shortages and environmental protection.
第4题
Global Water Problem
The UN's World Summit on Sustainable Development to be held in Johannesburg from August 26 to September 4 is supposed to result in plans to reduce global poverty and the North-South income gap without causing irreparable damage to the environment. As a follow up to the Earth Summit of 1992, it is using the Millennium Development Goals (MDG) as a guide. These are part of the UN's 2000 Millennium Declaration, which resolved to cut the proportion of people who are unable to get safe drinking water in half by 2015.
Following are some facts and figures on the state of the world's water supplies and the UN's goals regarding water.
Water Supply and Shortage
A new study warns that about thirty percent of the world's people may not have enough water by the year 2025. A private American organization called Population Action International did the new study. It says more than three hundred-thirty-five-million people lack enough water now. The people live in twenty-eight countries which are mostly in Africa or the Middle East.
PAI researcher Robert Engelman says by the year 2025 about three billion people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet the amount of water on Earth stays the same.
Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.
Freshwater ecosystems cover less than 1 percent of the Earth's surface. Ice mostly in the form. of glacier comprises 69 percent of the world's freshwater supplies and groundwater is 30 percent. Wetlands, which include marshes and swamps, comprise 0. 3 percent, lakes 0.3 percent, and rivers 0.06 percent. However, many experts argue that the world's wells are not about to run dry.
They say that on a global level we have enough water but must use it more wisely and attempt to address uneven distribution around the globe which is related partly to different rainfall patterns.
Problem/Issue
Lacking of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking water is not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera (霍乱), which are carried in water. Lack of water may also result in more international conflicts. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. Water shortage would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.
Moreover, there are many problems with the world's fresh water supplies, including pollution from industry, agriculture and untreated sewage. The World Bank says inefficient infrastructure means that water that does not reach customers is not only wasted but ultimately not paid for. This can lead to infrastructure decay because of a lack of funding for maintenance. Tariffs are often kept low by politicians seeking to woo voters, leading many to advocate the privatization of water services-95 percent of municipal water services are publicly run but this is controversial because of concerns that the very poor could be denied access. Privatization advocates argue that services will improve at a lower cost as a result because the contracted operators will have an incentive (动机) to improve their product.
Dams
Dams have brought huge benefits to more than 140 countries but the social and environmental costs have often been high. Perhaps
A．Y
B．N
C．NG
第5题
What's the main idea of this passage？
A．World population and food shortage.
B．World population and climate change.
C．Desert plants and gene technology.
D．Food and fuel shortage in the future.
第6题
A．The shortage of water,
B．The shortage of food.
C．The condition of weightlessness.
D．The great pressure outside the spacecraft.
第7题
ll in death rates as a result of improvements in medical care.
A.as
B.and
C.but
D.or
第8题
There was a shortage of water in the area two months ago ______ hot weather.
A．by way of
B．in spite of
C．because of
D．by means of
第9题
A large population in an underdeveloped country may lead to ______.
A．a rise in work efficiency
B．a redaction in average income
C．a decline in grain production
D．a shortage of farm workers
第10题
A.Canada is in desperate need of talented people
B.Canada can feed a much larger population
C.Canada is suffering from labor shortage
D.Canada is a multicultural country
