POLLUTION! IN THE BAY
A. Pouring water into the sea sounds harmless enough. But in Florida Bay, a large and shallow section of the Gulf of Mexico that lies between the southern end of the Everglades and the Florida Keys, it is proving highly controversial. That is because researchers are divided over whether it will help or hinder the plants and animals that live in the bay.
B. What is at risk is the future of the bay’s extensive beds of seagrasses. These grow on the bay’s muddy floor and act as nurseries for the larvae of shrimps, lobsters and fish – many of the important sport and commercial-fishing species. Also in danger is an impressive range of coral reefs that run the length of the Florida Keys and form the third-largest barrier reef in the world. Since the 1980s, coral cover has dropped by 40%, and a third of the coral species have gone. This has had a damaging effect on the animals that depend on the reef, such as crabs, turtles and nearly 600 species of fish.
C. What is causing such ecological change is a matter of much debate. And the answer is of no small consequence. This is because the American government is planning to devote $8 billion over the next 30 years to revitalise the Everglades. Seasonal freshwater flows into the Everglades are to be restored in order to improve the region’s health. But they will then run off into the bay.
D. Joseph Zieman, a marine ecologist at the University of Virginia, thinks this is a good idea. He believes that a lack of fresh water in the bay is its main problem. The blame, he says, lies with a century of drainage in the Everglades aimed at turning the marshes into farmland and areas for development. This has caused the flow of fresh water into Florida Bay to dwindle, making the water in the bay, overall, more saline. This, he argues, kills the seagrasses, and as these rots, nutrients are released that feed the microscopic plants and animals that live in the water. This, he says, is why the bay’s once crystal-clear waters often resemble pea soup. And in a vicious circle, these turbid blooms block out sunlight, causing more seagrasses to die and yet more turbidity.
E. Brian Lapointe, a marine scientist at the Harbour Branch Oceanographic Institution at Fort Pierce in Florida, disagrees. He thinks seagrasses can tolerate much higher levels of salinity than the bay actually displays. Furthermore, he notes that when freshwater flows through the Everglades were increased experimentally in the 1990s, it led to massive plankton blooms. Freshwater running off from well-fertilised farmlands, he says, caused a fivefold rise in nitrogen levels in the bay. This was like pouring fuel on a fire. The result was mass mortality of seagrasses because of increased turbidity from the plankton. Dr Lapointe adds that, because corals thrive only in waters where nutrient levels are low, restoring freshwater rich in nitrogen will do more damage to the reef.
F. It is a plausible theory. The water flowing off crops that are grown on the 750,000 acres of heavily fertilised farmland on the northern edge of the Everglades is rich in nitrogen, half of which ends up in the bay. But Bill Kruczynski, of America’s Environmental Protection Agency, is convinced that nitrogen from farmlands is not the chief problem. Some coral reefs well away from any nitrogen pollution are dying and, curiously, a few are thriving. Dr Kruczynski thinks that increased nutrients arriving from local sewage discharges from the thousands of cesspits along the Florida Keys are part of the problem.
G. Such claims and counterclaims make the impact of the restoration plan difficult to predict. If increased salinity is the main problem, the bay’s ecology will benefit from the Everglades restoration project. If, however, nitrogen is the problem, increasing the flow of freshwater could make matters much worse.
H. If this second hypothesis proves correct, the cure is to remove nitrogen from farmland or sewage discharges, or perhaps both. Neither will be easy. Man-made wetlands, at present, being built to reduce phosphate runoff into the bay—also from fertilisers—would need an algal culture (a sort of contained algal bloom) added to them to deal with discharges from farmlands. That would be costly. So too would be the replacement of cesspits with proper sewerage—one estimate puts the cost at $650m. Either way, it is clear that when, on December 1st, 3,000 square miles of sea around the reef are designated as a “protective zone” by the deputy secretary of commerce, Sam Bodman, this will do nothing to protect the reef from pollution.
I. Some argue, though, that there is a more fundamental flaw in the plans for the bay: the very idea of returning it to a Utopian ideal before man wrought his damage. Nobody knows what Florida Bay was like before the 1950s when engineers cut the largest canals in the Everglades and took most of the water away. Dr Kruczynski suspects it was more like an estuary. The bay that many people wish to re-create could have been nothing more than a changing phase in the bay’s history.
J. These arguments do not merely threaten to create ecological problems but economic ones as well. The economy of the Florida Keys depends on tourism—the local tourist industry has an annual turnover of $2.5 billion. People come for fishing-boat trips, for manatee watching, or for scuba diving and snorkeling to view the exotically coloured corals. If the plan to restore the Everglades makes problems in the bay and the reef worse, it could prove a very expensive mistake.
DESIGN THE MAT AND FOOT HEALTH
A. Indoor types will appreciate the cobblestone walkway, a knobbly textured plastic mat that they can wobble along in the comfort of their own homes. And for the more adventurous, there are shoes designed to throw you off balance.
B. The technology may be cutting edge, but its origins are deep and exotic. Research into the idea that flat floors could be detrimental to our health was pioneered back in the late 1960s. While others in Long Beach, California, contemplated peace and love, podiatrist Charles Brantingham and physiologist Bruce Beekman were concerned with more pedestrian matters. They reckoned that the growing epidemic of high blood pressure, varicose veins and deep-vein thromboses might be linked to the uniformity of the surfaces that we tend to stand and walk on.
C. The trouble, as they saw it, was that walking continuously on flat floors, sidewalks and streets concentrated forces on just a few areas of the foot. As a result, these surfaces are likely to be far more conducive to chronic stress syndromes than natural ones, where the foot meets the ground in a wide variety of orientations. The anatomy of the foot parallels that of the human hand – each having 26 bones, 33 joints and more than 100 muscles, tendons and ligaments. Modern lifestyles waste all this flexibility in your socks. Brantingham and Beekman became convinced that damage was being done simply by people standing on even surfaces and that this could be rectified by introducing a wobble.
D. “In Beijing and Shanghai city dwellers take daily walks on cobbled paths to improve their health.” To test their ideas, they got 65 clerks and factory workers to try standing on a variable terrain floor – spongy mats with amounts of giving across the surface. This modest irregularity allowed the soles of the volunteers’ feet to deviate slightly from the horizontal each time they shifted position. As the researchers hoped, this simple intervention turned out to make a huge difference over just a few weeks. Just a slight wobble from the floor activated a host of muscles in people’s legs, which in turn helped to pump blood back to their hearts. The muscle action prevented the pooling of blood in their feet and legs, reducing the stress on the entire cardiovascular system. And two-thirds of the volunteers reported feeling much less tired. Yet decades later, the flooring of the world’s workplaces remains relentlessly smooth.
E. Earlier this year, however, the idea was given a new lease of life when researchers in Oregon announced findings from a similar experiment with people over 60. John Fisher and colleagues at the Oregon Research Institute in Eugene designed a mat intended to replicate the effect of walking on cobblestones. In tests funded by the National Institute of Aging, they got some 50 adults to walk on the mats in their stockinged feet for less than an hour three times a week. After 16 weeks, these people showed marked improvements in balance and mobility, and even a significant reduction in blood pressure. People in a control group who walked on ordinary floors also improved but not as dramatically.
F. The mats are now on sale at $35. “Our first 1000 cobblestone mats sold in three weeks,” Fisher says. Production is now being scaled up. Even so, demand could exceed supply if this foot-stimulating activity really is a “useful non-pharmacological approach for preventing or controlling hypertension of older adults”, as the researchers believe. They are not alone in extolling the revitalizing powers of cobblestones. Reflexologists have long advocated walking on textured surfaces to stimulate so-called “acupoints” on the soles of the feet. Practitioners of this unorthodox therapy believe that pressure applied to particular spots on the foot connects directly to corresponding organs and somehow enhances their function. In China, spas, hotels, apartment blocks and even factories promote their cobblestone paths as healthful amenities. Fisher admits he got the idea from regular visits to the country. In Beijing and Shanghai city dwellers take daily walks along cobbled paths to improve their health. “In the big cities, people take off their shoes and walk on these paths for 5 or 10 minutes, perhaps several times a day,” Fisher says.
G. The idea is now taking off in Europe too. People in Germany, Austria and Switzerland can visit “barefoot parks” and walk along “paths of the senses” – with mud, logs, stone and moss underfoot – to receive what’s known there as reflexion-massage. And it is not difficult to construct your own “health pathway”. American reflexologists Barbara and Kevin Kunz, based in Albuquerque, New Mexico, advise that you cobble together a walkway using broom handles, bamboo poles, hosepipes, gravel, pebbles, dried peas, driftwood, fallen logs, sand, door mats and strips of turf.
H. If your enthusiasm for DIY doesn’t stretch to this, and Fisher’s cobblestone mats are all sold out, there is another option. A new shoe on the market claims to transform flat, hard, artificial surfaces into something like natural uneven ground. “These shoes have an unbelievable effect,” says Benno Nigg, an exercise scientist at the human performance laboratory of Calgary University in Canada, which has done contract research for the shoe’s manufacturers. “They are one of the best things to have happened to humankind for years.” Known as Masai Barefoot Technology, or MBTs, the shoes have rounded soles that cause you to rock slightly when you stand still, exercising the small muscles around the ankle that are responsible for fore-aft stability. Forces in the joint are reduced, putting less strain on the system, Nigg claims.
THE INGENUITY GAP
A. Ingenuity, as I define it here, consists not only of ideas for new technologies like computers or drought-resistant crops but, more fundamentally, of ideas for better institutions and social arrangements, like efficient markets and competent governments.
B. How much and what kinds of ingenuity a society requires depends on a range of factors, including the society’s goals and the circumstances within which it must achieve those goals—whether it has a young population or an ageing one, an abundance of natural resources or a scarcity of them, an easy climate or a punishing one, whatever the case may be.
How much and what kinds of ingenuity a society supplies also depends on many factors, such as the nature of human inventiveness and understanding, the rewards an economy gives to the producers of useful knowledge, and the strength of political opposition to social and institutional reforms.
C. A good supply of the right kind of ingenuity is essential, but it isn’t, of course, enough by itself. We know that the creation of wealth, for example, depends not only on an adequate supply of useful ideas but also on the availability of other, more conventional factors of production, like capital and labor. Similarly, prosperity, stability and justice usually depend on the resolution, or at least the containment, of major political struggles over wealth and power. Yet within our economies ingenuity often supplants labor, and growth in the stock of physical plants is usually accompanied by growth in the stock of ingenuity. And in our political systems, we need great ingenuity to set up institutions that successfully manage struggles over wealth and power. Clearly, our economic and political processes are intimately entangled with the production and use of ingenuity.
D. The past century’s countless incremental changes in our societies around the planet, in our technologies and our interactions with our surrounding natural environments, have accumulated to create a qualitatively new world. Because these changes have accumulated slowly, it’s often hard for us to recognize how profound and sweeping they’ve been. They include far larger and denser populations; much higher per capita consumption of natural resources; and far better and more widely available technologies for the movement of people, materials, and especially information.
E. In combination, these changes have sharply increased the density, intensity, and pace of our interactions with each other; they have greatly increased the burden we place on our natural environment; and they have helped shift power from national and international institutions to individuals in subgroups, such as political special interests and ethnic factions.
F. As a result, people in all walks of life—from our political and business leaders to all of us in our day-to-day—must cope with much more complex, urgent, and often unpredictable circumstances. The management of our relationship with this new world requires immense and ever-increasing amounts of social and technical ingenuity. As we strive to maintain or increase our prosperity and improve the quality of our lives, we must make far more sophisticated decisions, and in less time, than ever before.
G. When we enhance the performance of any system, from our cars to the planet’s network of financial institutions, we tend to make it more complex. Many of the natural systems critical to our well-being, like the global climate and the oceans, are extraordinarily complex, to begin with. We often can’t predict or manage the behavior of complex systems with much precision, because they are often very sensitive to the smallest of changes and perturbations, and their behavior can flip from one mode to another suddenly and dramatically. In general, as the human-made and natural systems, we depend upon becoming more complex, and as our demands on them increase, the institutions and technologies we use to manage them must become more complex too, which further boosts our need for ingenuity.
H. The good news, though, is that the last century’s stunning changes in our societies and technologies have not just increased our need for ingenuity; they have also produced a huge increase in its supply. The growth and urbanization of human populations have combined with astonishing new communication and transportation technologies to expand interactions among people and produce larger, more integrated, and more efficient markets. These changes have, in turn, vastly accelerated the generation and delivery of useful ideas.
I. But—and this is the critical “but”—we should not jump to the conclusion that the supply of ingenuity always increases in lockstep with our ingenuity requirement: while it’s true that necessity is often the mother of invention, we can’t always rely on the right kind of ingenuity appearing when and where we need it. In many cases, the complexity and speed of operation of today’s vital economic, social, and ecological systems exceed the human brain’s grasp. Very few of us have more than a rudimentary understanding of how these systems work. They remain fraught with countless “unknown unknowns,” which makes it hard to supply the ingenuity we need to solve problems associated with these systems.
J. In this book, I explore a wide range of other factors that will limit our ability to supply the ingenuity required in the coming century. For example, many people believe that new communication technologies strengthen democracy and will make it easier to find solutions to our societies’ collective problems, but the story is less clear than it seems. The crush of information in our everyday lives is shortening our attention span, limiting the time we have to reflect on critical matters of public policy, and making policy arguments more superficial.
K. Modern markets and science are an important part of the story of how we supply ingenuity. Markets are critically important because they give entrepreneurs an incentive to produce knowledge. As for science, although it seems to face no theoretical limits, at least in the foreseeable future, practical constraints often slow its progress. The cost of scientific research tends to increase as it delves deeper into nature. And science’s rate of advance depends on the characteristic of the natural phenomena it investigates, simply because some phenomena are intrinsically harder to understand than others, so the production of useful new knowledge in these areas can be very slow. Consequently, there is often a critical time lag between the recognition between a problem and the delivery of sufficient ingenuity, in the form of technologies, to solve that problem. Progress in the social sciences is especially slow, for reasons we don’t yet understand; but we desperately need better social scientific knowledge to build the sophisticated institutions today’s world demands.
Part 1
Questions 1-4
Reading Passage has ten paragraphs, A–J. Which paragraph contains the following information?
1. See grass turned to be more resistant to the saline water level in the Bay. 1
2. Significance of finding a specific reason in controversy 2
3. Expensive proposals raised to solve the nitrogen dilemma 3
4. A statistic of ecological changes in both the coral area and species 4
Questions 5-8
Use the information in the passage to match the people (listed A-C) with opinions or deeds below.
A. Bill Kruczynski
B. Brian Lapointe
C. Joseph Zieman
5. Drainage system in everglades actually results in high salty water in the bay. 5
6. Restoring water high in nitrogen level will make more ecological side effect. 6
7. High nitrogen levels may be caused by the nearby farmland. 7
8. Released sewage rather than nutrients from agricultural area increase the level of Nitrogen. 8
Questions 9-13
Do the following statements agree with the information given in the Reading Passage?
TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN if there is no information on this
9. Everyone agrees with “pouring water into the sea is harmless enough” even in the Florida Bay area. 9
10. Nitrogen was poured in from different types of crops as water flows through. 10
11. Everglades restoration project can be effective regardless of the cause of the pollution. 11
12. Human has changed Florida Bay where old image before 1950s is unrecalled. 12
13. Tourism contributes fundamentally to the Florida Bay area. 13
Part 2
Questions 14-18
Do the following statements agree with the information given in the Reading Passage?
TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN if there is no information on this
14. Charles Brantingham and Bruce Beekman are the pioneers to research the connection between hyper illness and conditions of road. 14
15. John Fisher and his colleagues found that those who walked on cobble-stones suffered a worsening physical condition. 15
16. Manufacture of Fisher’s cobblestone mats booms due to high demand of this product. 16
17. The research works such as customized pathway from Barbara and Kevin Kunz were inspired from an oversea trip. 17
18. Benno Nigg suggests that shoes of Masai Barefoot Technology have a specific age limitation. 18
Questions 19-21
Choose the correct letter A, B, C or D.
Questions 22-26
Complete the sentences below. Choose NO MORE THAN TWO WORDS from the passage.
The anatomy of human’s foot is complex; which 22 human hand. The experiment, conducted on employees, showed that body movement on surface of different condition can lower the 23 on heart. Similarity was also found in another experiment conducted by a researcher from the Oregon Research Institute. The test also showed there was a substantial 24 in hypertension. Reflexologists advise people to work on a road with resistance to stimulate certain points of body via standing on the 25 . In the end, the author of the passage also advocates that people can build their own health 26 , except for buying the special mats and shoes.
Part 3
Questions 27-30
Complete each sentence with the appropriate answer, A, B, C, or D.
A. depends on many factors including climate.
B. depends on the management and solution of disputes.
C. is not only of technological advance but more of institutional renovation.
D. also depends on the availability of some traditional resources.
27. The definition of ingenuity 27
28. The requirement for ingenuity 28
29. The creation of social wealth 29
30. The stability of society 30
Questions 31-33
Choose the correct letter A, B, C or D.
Questions 34-40
Do the following statements agree with the information given in the Reading Passage?
TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN if there is no information on this
34. The demand for ingenuity has been growing during the past 100 years. 34
35. The ingenuity we have may be inappropriate for solving problems at hand. 35
36. There are very few who can understand the complex systems of the present world. 36
37. More information will help us to make better decisions. 37
38. The next generation will blame the current government for their conduct. 38
39. Science tends to develop faster in certain areas than others. 39
40. Social science develops especially slowly because it is not as important as natural science. 40