By the year 2030, the Earth's population is expected to increase to 10 billion; ideally, all would enjoy standards of living equivalent to those of present-day industrial democracies. However, if 10 billion people consume critical natural resources such as copper, nickel, and petroleum at the current per capita rates of industrialized countries, and if new resources are not discovered or substitutes developed, such an ideal would last a decade or less. Moreover, projections based on the current rate of waste production in many industrialized countries suggest that 10 billion people would generate enough solid waste every year to bury a large city and its surrounding suburbs 100 meters deep.
These estimates are not meant to predict a grim future. Instead they emphasize the incentives for recycling, conservation, and a switch to alternative materials. They also suggest that the traditional model of industrial activity, in which individual manufacturing processes take in raw materials and generate products to be sold plus waste to be disposed of, should be transformed into a more integrated model: an industrial ecosystem. In such a system the consumption of energy and materials is optimized, wastes and pollution are minimized, and the effluents of one process ?whether they are spent catalysts from petroleum refining or discarded plastic containers from consumer products ?serve as the raw material for another process.
Materials in an ideal industrial ecosystem would not be depleted any more than are materials in a biological ecosystem, in which plants synthesize nutrients that feed herbivores, some of which in turn feed a chain of carnivores whose waste products and remains eventually feed further generations of plants. A chunk of steel could potentially show up one year in a tin can, the next year in an automobile, and 10 years later in the skeleton of a building. Some manufacturers are already making use of "designed offal" in the manufacture of metals and some plastics: tailoring the production of waste from a manufacturing process so that the waste can be fed directly back into that process or a related one. Such recycling still requires the expenditure of energy and the unavoidable generation of some wastes and harmful by-products, but at much lower levels than are typical today. The ideal industrial ecosystem, in which there is an economically viable role for every product of a manufacturing process, will not be attained soon; current technology is often inadequate to the task. However, if industrialized nations embrace major and minor changes in their current industrial practices and developing nations bypass older, less ecologically sound technologies, it should be possible to develop a more closed industrial ecosystem that would be more sustainable than current industrial practices, especially in the face of decreasing supplies of raw materials and-increasing problems of waste and pollution Of the following, which one is the best example of the use of "designed offal" (line 38) as it is defined in the passage?
A. A paper container manufacturer purchases recycled newspaper that is turned into pulp and used as the raw material for producing paper containers.When using a metal file, always remember to bear down on the forward stroke only. On the return stroke, lift the file clear of the surface to avoid dulling the instrument's teeth. Only when working on very soft metals is it advisable to drag the file's teeth slightly on the return stroke. This helps clear out metal pieces from between the teeth. It is best to bear down just hard enough to keep the file cutting at all times. Too little pressure uses only the tips of the teeth; too much pressure can chip the teeth. Move the file in straight lines across the surface. Use a vice to grip the work so that your hands are free to hold the file. Protect your hands by equipping the file with a handle. Buy a wooden handle and install it by inserting the pointed end of the file into the handle hole.
When using a file
A. always bear down on the return strokeFour boys -- Fred, Juan, Marc, and Paul -- and three girls-- Nita, Rachel, and Trisha -- will be assigned to a row of five adjacent lockers, numbered consecutively 1 through 5, arranged along a straight wall. The following conditions govern the
assignment of lockers to the seven children:
Each locker must be assigned to either one or two children, and each child must be assigned to exactly one locker.
Each shared locker must be assigned to one girl and one boy.
Juan must share a locker, but Rachel cannot share a locker.
Nita's locker cannot be adjacent to Trisha's locker. Fred must be assigned to locker 3.
Which one of the following is a complete and accurate list of the children who must be among those assigned to shared lockers?
A. Fred, JuanThe Galapagos Islands are in the Pacific Ocean, off the western coast of South America. They are a rocky, lonely spot, but they are also one of the most unusual places in the world. One reason is that they are the home of some of the last giant tortoises left on earth. Weighing hundreds of pounds, these tortoises, or land turtles, wander slowly around the rocks and sand of the islands. Strangely, each of these islands has its own particular kinds of tortoises. There are seven different kinds of tortoises on the eight islands, each kind being slightly different from the other. Hundreds of years ago, thousands of tortoises wandered around these islands. However, all that changed when people started landing there. When people first arrived in 1535, their ships had no refrigerators. This meant that fresh food was always a problem for the sailors on board. The giant tortoises provided a solution to this problem. Ships would anchor off the islands, and crews would row ashore and seize as many tortoises as they could. Once the animals were aboard the ship, the sailors would roll the tortoises onto their backs. The tortoises were completely helpless once on their backs, so they could only lie there until used for soups and stews. Almost 100,000 tortoises were carried off in this way. The tortoises faced other problems, too. Soon after the first ships, settlers arrived bringing pigs, goats, donkeys, dogs and cats. All of these animals ruined life for the tortoises.
Donkey and goats ate all the plants that the tortoises usually fed on, while the pigs. Dogs and cats consumed thousands of baby tortoises each year. Within a few years, it was hard to find any tortoise eggs-or even any baby tortoises. By the early 1900s, people began to worry that the last of the tortoises would soon die out. No one, however, seemed to care enough to do anything about the problem. More and more tortoises disappeared, even though sailors no longer needed them for food. For another fifty years, this situation continued. Finally, in the 1950s, scientist decided that something must be done. The first part of their plan was to get rid of as many cats, dogs and other animals as they could. Next, they tried to make sure that more baby tortoises would be born. To do this, they started looking for wild tortoise eggs. They gathered the eggs and put them in safe containers. When the eggs hatched, the scientists raised the tortoises in special pens. Both the eggs and tortoises were numbered so that the scientists knew exactly which kinds of tortoises they had-and which island they came from. Once the tortoises were old enough and big enough to take care of themselves, the scientists took them back to their islands and set them loose. This slow, hard work continues today, and, thanks to it, the number of tortoises is now increasing every year. Perhaps these wonderful animals will not disappear after all.
What happened first?
A. Sailors took tortoises aboard ships.Seemingly inconsequential changes in sea temperature due to global warming eventually result in declines in fish and seabird populations. A rise of just two degrees prevents the vertical mixing of seawater from different strata. This restricts the availability of upwelling nutrients to phytoplankton. Since zooplankton, which feed upon phytoplankton, feed the rest of the food chain, the declines are inevitable.
Which one of the following most accurately describes the role played in the argument by the statement that zooplankton feed upon phytoplankton?
A. It is a hypothesis supported by the fact that phytoplankton feed on upwelling nutrients.Experts anticipate that global atmospheric concentrations of carbon dioxide (CO2) will have-doubled by the end of the twenty-first century. It is known that CO2 can contribute to global warming by trapping solar energy that is being reradiated as heat from the Earth's surface. However, some research has suggested that elevated CO2 levels could enhance the photosynthetic rates of plants, resulting in a lush world of agricultural abundance, and that this CO2 fertilization effect might eventually decrease the rate of global warming. The increased vegetation in such an environment could be counted on to draw more CO, from the atmosphere. The level of CO2 would thus increase at a lower rate than many experts have predicted.
However, while a number of recent studies confirm that plant growth would be generally enhanced in an atmosphere rich in CO2, they also suggest that increased CO2 would differentially increase the growth rate of different species of plants, which could eventually result in decreased agricultural yields. Certain important crops such as corn and sugarcane that currently have higher photosynthetic efficiencies than other plants may lose that edge in an atmosphere rich in CO2. Patterson and Flint have shown that these important crops may experience yield reductions because of the increased performance of certain weeds. Such differences in growth rates between plant species could also alter ecosystem stability. Studies have shown that within rangeland regions, for example, a weedy grass grows much better with plentiful CO2 than do three other grasses. Because this weedy grass predisposes land to burning, its potential increase may lead to greater numbers of and more severe wildfires in future rangeland communities.
It is clear that the CO2 fertilization effect does not guarantee the lush world of agricultural abundance that once seemed likely, but what about the potential for the increased uptake of CO2 to decrease the rate of global warming? Some studies suggest that the changes accompanying global warming will not improve the ability of terrestrial ecosystems to absorb CO2. Billings' simulation of global warming conditions in wet tundra grasslands showed that the level of CO2 actually increased. Plant growth did increase under these conditions because of warmer temperatures and increased CO2 levels. But as the permafrost melted, more peat {accumulated dead plant material) began to decompose. This process in turn liberated more CO2 to the atmosphere. Billings estimated that if summer temperatures rose four degrees Celsius, the tundra would liberate 50 percent more CO2 than it does currently. In a warmer world, increased plant growth, which could absorb CO2 from the atmosphere, would not compensate for this rapid increase in decomposition rates. This observation is particularly important because high-latitude habitats such as the tundra are expected to experience the greatest temperature increase.
According to the passage, Billings' research addresses which one of the following questions?
A. Which kind of habitat will experience the greatest temperature increase in an atmosphere high in CO2?Philosopher Denise Meyerson views the Critical Legal Studies (CLS) movement as seeking to debunk orthodox legal theory by exposing its contradictions. However, Meyerson argues that CLS proponents tend to see contradictions where none exist, and that CLS overrates the threat that conflict poses to orthodox legal theory.
According to Meyerson, CLS proponents hold that the existence of conflicting values in the law implies the absence of any uniquely right solution to legal cases. CLS argues that these conflicting values generate equally plausible but opposing answers to any given legal question, and, consequently, that the choice between the conflicting answers must necessarily be arbitrary or irrational. Meyerson denies that the existence of conflicting values makes a case irresolvable, and asserts that at least some such cases can be resolved by ranking the conflicting values. For example, a lawyer's obligation to preserve a client's confidences may entail harming other parties, thus violating moral principle. This conflict can be resolved if it can be shown that in certain cases the professional obligation overrides ordinary moral obligations.
In addition, says Meyerson, even when the two solutions are equally compelling, it does not follow that the choice between them must be irrational. On the contrary, a solution that is not rationally required need not be unreasonable. Meyerson concurs with another critic that instead of concentrating on the choice between two compelling alternatives, we should rather reflect on the difference between both of these answers on the one hand, and some utterly unreasonable answer on the other ?such as deciding a property dispute on the basis of which claimant is louder. The acknowledgment that conflicting values can exist, then, does not have the far-reaching implications imputed by CLS; even if some answer to a problem is not the only answer, opting for it can still be reasonable.
Last, Meyerson takes issue with the CLS charge that legal formalism, the belief that there is a quasi-deductive method capable of giving solutions to problems of legal choice, requires objectivism, the belief that the legal process has moral authority. Meyerson claims that showing the law to be unambiguous does not demonstrate its legitimacy: consider a game in which participants compete to steal the item of highest value from a shop; while a person may easily identify the winner in terms of the rules, it does not follow that the person endorses the rules of the game. A CLS scholar might object that legal cases are unlike games, in that one cannot merely apply the rules without appealing to, and therefore endorsing, external considerations of purpose, policy, and value. But Meyerson replies that such considerations may be viewed as part of, not separate from, the rules of the game.
The phrase "far-reaching implications" (line 36) refers to the idea that
A. any choice made between conflicting solutions to a legal question will be arbitraryMount Vesuvius, a volcano located between the ancient Italian cities of Pompeii and Herculaneum, has received much attention because of its frequent and destructive eruptions. The most famous of these eruptions occurred in A. D. 79. The volcano had been inactive for centuries. There was little warning of the coming eruption, although one account unearthed by archaeologists says that a hard rain and a strong wind had disturbed the celestial calm during the preceding night. Early the next morning, the volcano poured a huge river of molten rock down upon Herculaneum, completely burying the city and filling in the harbor with coagulated lava. Meanwhile, on the other side of the mountain, cinders, stone and ash rained down on Pompeii. Sparks from the burning ash ignited the combustible rooftops quickly. Large portions of the city were destroyed in the conflagration. Fire, however, was not the only cause of destruction. Poisonous sulphuric gases saturated the air. These heavy gases were not buoyant in the atmosphere and therefore sank toward the earth and suffocated people. Over the years, excavations of Pompeii and Herculaneum have revealed a great deal about the behavior of the volcano. By analyzing data, much as a zoologist dissects a specimen animal, scientist have concluded that the eruption changed large portions of the area's geography. For instance, it turned the Sarno River from its course and raised the level of the beach along the Bay of Naples. Meteorologists studying these events have also concluded that Vesuvius caused a huge tidal wave that affected the world's climate. In addition to making these investigations, archaeologists have been able to study the skeletons of victims by using distilled water to wash away the volcanic ash. By strengthening the brittle bones with acrylic paint, scientists have been able to examine the skeletons and draw conclusions about the diet and habits of the residents. Finally, the excavations at both Pompeii and Herculaneum have yielded many examples of classical art, such as jewelry made of bronze, which is an alloy of copper and tin. The eruption of Mount Vesuvius and its tragic consequences have provided us with a wealth of data about the effects that volcanoes can have on the surrounding area. Today volcanologists can locate and predict eruptions, saving lives and preventing the destruction of cities and cultures.
The poisonous gases were not _______________ in the air.
A. able to floatQuasars ?celestial objects so far away that their light takes at least 500 million years to reach Earth ?have been seen since 1963. For anything that far away to appear from Earth the way quasars do, it would have to burn steadily at a rate that produces more light than 90 billion suns would produce. But nothing that burns at a rate that produces that much light could exist for more than about 100 million years.
If the statements above are true, which one of the following must also be true on the basis of them?
A. Instruments in use before 1963 were not sensitive enough to permit quasars to be seen.Many educators in Canada and the United States advocate multicultural education as a means of achieving multicultural understanding. There are, however, a variety of proposals as to what multicultural education should consist of. The most modest of these proposals holds that schools and colleges should promote multicultural understanding by teaching about other cultures, teaching which proceeds from within the context of the majority culture. Students should learn about other cultures, proponents claim, but examination of these cultures should operate with the methods, perspectives, and values of the majority culture. These values are typically those of liberalism: democracy, tolerance, and equality of persons.
Critics of this first proposal have argued that genuine understanding of other cultures is impossible if the study of other cultures is refracted through the distorting lens of the majority culture's perspective. Not all cultures share liberal values. Their value systems have arisen in often radically different social and historical circumstances, and thus, these critics argue, cannot be understood and adequately appreciated if one insists on approaching them solely from within the majority culture's perspective.
In response to this objection, a second version of multicultural education has developed that differs from the first in holding that multicultural education ought to adopt a neutral stance with respect to the value differences among cultures. The values of one culture should not be standards by which others are judged; each culture should be taken on its own terms. However, the methods of examination, study, and explanation of cultures in this second version of multicultural education are still identifiably Western. They are the methods of anthropology, social psychology, political science, and sociology. They are, that is, methods which derive from the Western scientific perspective and heritage.
Critics of this second form of multicultural education argue as follows: The Western scientific heritage is founded upon an epistemological system that prizes the objective over the subjective, the logical over the intuitive, and the empirically verifiable over the mystical. The methods of social-scientific examination of cultures are thus already value laden; the choice to examine and understand other cultures by these methods involves a commitment to certain values such as objectivity. Thus, the second version of multicultural education is not essentially different from the first. Scientific discourse has a privileged place in Western cultures, but the discourses of myth, tradition, religion, and mystical insight are often the dominant forms of thought and language of non-Western cultures. To insist on trying to understand nonscientific cultures by the methods of Western science is not only distorting, but is also an expression of an attempt to maintain a Eurocentric cultural chauvinism: the chauvinism of science. According to this objection, it is only by adopting the (often nonscientific) perspectives and methods of the cultures studied that real understanding can be achieved.
Critics who raise the objection discussed in the second paragraph would be most likely to agree with which one of the following?
A. The social and historical circumstances that give rise to a culture's values cannot be understood by members of a culture with different values.Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only LSAC exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your LSAT-TEST exam preparations and LSAC certification application, do not hesitate to visit our Vcedump.com to find your solutions here.