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  3. This week and next, governments, international agencies and nongovernmental organizations are gathering in Mexico City at the Wo

This week and next, governments, international agencies and nongovernmental organizations are gathering in Mexico City at the Wo

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问题     This week and next, governments, international agencies and nongovernmental organizations are gathering in Mexico City at the World Water Forum to discuss the legacy of global Mulhollandism in water—and to chart a new course.
    They could hardly have chosen a better location. Water is being pumped out of the aquifer on which Mexico City stands at twice the rate of replenishment. The result: the city is subsiding at the rate of about half a meter every decade. You can see the consequences in the cracked cathedrals, the tilting Palace of Arts and the broken water and sewerage pipes.
    Every region of the world has its own variant of the water crisis story. The mining of groundwaters for irrigation has lowered the water table in parts of India and Pakistan by 30 meters in the past three decades. As water goes down, the cost of pumping goes up, undermining the livelihoods of poor farmers.
    In China, urbanization and rapid growth has lifted millions of people out of poverty. It has also left a water crisis of epic proportions. The Hai-Huai-Yellow river basin tells its own story. More than 80 percent of river lengths are chronically polluted. The basin is home to more than 400 million people and about one half of the rural poor. It produces more than half of China’s wheat and corn. And it is running out of water. Current use exceeds river flow by a third, leading to another case of groundwater overexploitation.
    What is driving the global water crisis? Physical availability is part of the problem. Unlike oil or coal, water is an infinitely renewable resource, but it is available in a finite quantity. With water use increasing at twice the rate of population growth, the amount available per person is shrinking— especially in some of the poorest countries.
    Challenging as physical scarcity may be in some countries, the real problems in water go deeper. The 20th-century model for water management was based on a simple idea: that water is an infinitely available free resource to be exploited, dammed or diverted without reference to scarcity or sustainability.
    Across the world, water-based ecological systems—rivers, lakes and watersheds—have been taken beyond the frontiers of ecological sustainability by policy makers who have turned a blind eye to the consequences of over-exploitation.
    We need a new model of water management for the 21st century. What does that mean? For starters, we have to stop using water like there’s no tomorrow—and that means using it more efficiently at levels that do not destroy our environment. The buzzword at the Mexico Water forum is "integrated water resource management." What it means is that governments need to manage the private demand of different users and manage this precious resource in the public interest.
    There is another, equally profound challenge. We have to strengthen the rights and the voice of the poor—and it means putting social justice at the center of water management.
According to the author, the main reason that drives water crisis lies in______.
选项 A、water’s finite quantity
B、social urbanization
C、rapid population growth
D、ill-functioned water management
答案D
解析 属信息推断题。根据题干我们可以迅速定位到文章的第四段、第五段和第六段。在第四段、第五段，作者都提到了导致水危机的一些原因，如水资源的有限性、城市化以及人口的快速增长，但是题干问的是导致水资源危机的主要原因，所以我们必须找出其更深层次的原因。而这一原因在文章的第六段提及到了，就是我们现行水资源管理制度的不合理，故选项D正确。
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