Removing carbon dioxide from the atmosphere is essential to meeting international climate goals, scientists say. Without it, it’s all but impossible to reach net-zero greenhouse gas emissions in time to limit global warming to 1.5 or 2 degrees Celsius, the primary targets of the Paris climate agreement.
Yet carbon dioxide isn’t the only climate-warming gas that needs a sharp cutback in the atmosphere. Experts are turning their focus to methane (甲烷) as well.
On Tuesday and Wednesday, the National Academies of Sciences, Engineering and Medicine hosted a workshop dedicated to atmospheric methane removal, which is the process of removing methane emissions directly from the air. The workshop included presentations by dozens of researchers and policy experts addressing questions about the science and effectiveness of methane removal, potential side effects and unintended consequences and the ways it should be governed and regulated.
These presentations will be used to inform a forthcoming NASEM report on atmospheric methane removal. The study will examine the global need for methane removal, viable options for carrying it out and potential risks and benefits, while outlining a road map for future research. The subject is more complicated than carbon dioxide removal, which has received more attention and research.
Methane has a far shorter lifetime in the atmosphere than carbon dioxide, yet it’s a much more powerful greenhouse gas while it lasts. The world already has warmed by more than 1 degree Celsius since the Industrial Revolution, and scientists estimate that methane may be responsible for as much as 0.5 degrees.
Reducing methane emissions at their sources is a growing priority. However, Methane removal, by comparison, is more complex. For one thing, methane is far less abundant in the atmosphere than carbon dioxide, meaning methane capture systems must process much larger quantities of air in order to make a meaningful difference. For another, there are also uncertainties about unintended side effects of some emerging technologies. Adding chlorine (氯) to the atmosphere, for instance, can actually increase the lifetime of methane in the atmosphere if it isn’t carefully dosed. It can also attack the Earth’s protective ozone layer. Besides, chlorine-based methods could decrease certain other types of climate-warming gases in the atmosphere in addition to methane.
1. According to the passage, what is not the issue of the workshop?A.The effectiveness of methane removal. | B.The side effects of removing methane. |
C.The predictable results of methane removal. | D.The method of controlling methane removal. |
A.To persuade the readers to focus on the presentation. |
B.To inform the readers of the significance of the study. |
C.To call on the people to reduce the Methane emission. |
D.To discuss about the problems that may arise from the removal. |
A.The carbon dioxide has a longer lifetime in atmosphere. |
B.The methane is harder to be caught because of its traits. |
C.Scientists have doubts about the effectiveness of the methods. |
D.The new technologies may bring about the negative effects. |
A.The NASEM faces a great challenge | B.The methane contributes to global warming |
C.The government reports on methane removal | D.The scientists explore pulling methane out of air |
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【推荐1】Parents once shouted, “Don’t get dirty!”, as they angrily watched their children spoil their best clothes, their whites turning into brown before the day was over.
Today, many parents may secretly wish their children had the chance to pick up a bit of dirt. With the rise of urbanism (城市化), and exciting video games and social media, contact with nature is much rarer than in the past. For many, there is simply no chance to get muddy (沾满泥的). According to recent research, the dirt outside is teaming with friendly microorganisms that can train the immune system and build resistance (抵抗力) to many illnesses, including allergies, asthma and even depression and anxiety.
These findings show that outdoor exercise is not only beneficial because of the chance to wander free — but that certain natural materials, such as soil and mud, also contain surprisingly powerful microorganisms whose positive impact on children’s health we are only beginning to fully understand. Outdoor play can also offer valuable learning experiences. For example, the act of playing mud or sand can help children develop the way their senses and movement interact.
Such activities — away from the house or classroom— may also help children to find ways to deal with emotions that may be hard to explore in other environments. So-called “sand tray therapy”, which involves using sand and small statues to express one’s thoughts and feelings, is an accepted form of guidance for children who are struggling to express their emotional state.
Clearly, people who spent most their childhood in the countryside tend to show a better response to stressful events like public speaking compared with those who had grown up in cities. “The people who grew up in cities are kind of ‘walking time bombs’ when facing the stress we meet today. However, people since childhood who spent lots of time in nature are generally more positive.” says Christopher Lowry, a professor of integrative physiology.
1. How does the author introduce the topic?A.By providing a research. | B.By giving a definition. |
C.By making a comparison. | D.By answering a question. |
A.Improving the immune system. | B.Expressing emotions in proper ways. |
C.Gaining valuable learning experiences. | D.Teaming with friendly microorganisms. |
A.Because they are harmful to the public. | B.Because they are good at public speaking. |
C.Because they are more easily hurt by stress. | D.Because they always stay positive and energetic. |
A.Getting dirty?—Muddy puddles are actually good. |
B.Outdoor activities are far more popular than before. |
C.Children will have no stress if they live in the countryside. |
D.Illnesses can be avoided if children are confident and positive. |
But in many other homes, this china-and-silver elegance has given way to a stoneware (粗陶) and stainless informality, with dresses assuming an equally casual-Friday look. For hosts and guests, the change means greater simplicity and comfort. For makers of fine china in Britain, it spells economic hard times. Last week
Although a strong pound and weak markets in Asia play a role in the downsizing, the layoffs in Stoke have their roots in earthshaking social shifts. A spokesman for Royal Doulton admitted that the company "has been somewhat slow in catching up with the trend" toward casual dining. Families eat together less often, he explained, and more people eat alone, either because they are single or they eat in front of television. Even dinner parties, if they happen at all, have gone casual. In a time of long work hours and demanding family schedules, busy hosts insist, rightly, that it's better to share a takeout pizza on paper plates in the family room than to wait for the perfect moment or a "real" dinner party.
Too often, the perfect moment never comes. Iron a fine-patterned tablecloth? Forget it. Polish the silver? Who has time? Yet the loss of formality has its down side. The fine points of etiquette (礼节) that children might once have learned at the table by observation or instruction from parents and grandparents (" Chew with your mouth closed." "Keep your elbows off the table. ") must be picked up else-where. Some companies now offer etiquette seminars for employees who may be able professionally but inexperienced socially.
1. Why do people tend to follow the trend to casual dining?
A.Busy schedules leave people no time for formality |
B.Family members need more time to relax. |
C.People prefer to live a comfortable life. |
D.Young people won't follow the etiquette of the older generation. |
A.a seller of stainless steel tableware |
B.a dealer in stoneware |
C.a pottery chain store |
D.a producer of fine china |
A.the increased value of the pound |
B.the worsening economy in Asia |
C.the change in people's way of life |
D.the fierce competition at home and abroad |
A.are still a must on certain occasions |
B.are certain to return sooner or later |
C.are still being taught by parents at home |
D.can help improve personal relationships |
【推荐3】What will man be like in 5,000 or even 50,000 year from now on? We can only make a guess, of course. However, we can be sure that he will greatly differ from what he is today.
Let us take an obvious example. Man, even five hundred years ago, was shorter than he is today.
On the other hand, we make less use of out* arms and legs.
Perhaps all this gives the impression that future man will not be a very attractive creature to look at! This may be true.
A.For man is slowly changing all the time. |
B.As a result, these are likely to grow weaker. |
C.Man will live in the earth for a long time. |
D.Now on average, man is about three inches taller. |
E.This is likely to bring about a physical change, too. |
F.What9s more, man is likely to have a wonderful life. |
G.All in all, in spite of all these changes, future men will still have a lot in common with us. |
【推荐1】A new rule has been passed that will protect more than 50 of the world’s shark species, many of which are endangered. The rule was signed by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which manages how people deal in plants and animals. Most of the world’s countries are members of CITE. The rule puts 60 shark species under the protection of CITES.
One of the reasons sharks are endangered is that they are hunted for their fins, which are used in shark fin soup. The sharks that are hunted most for their fins include blue and tiger sharks, which were regarded as dangerous creatures. Thanks to this agreement, around 95% of sharks that people catch for their fins are now protected. This means that anyone trying to buy or sell these types of sharks must present an official document. These official documents will only be offered to people or companies who have proved to scientists that their business doesn’t endanger wildlife or damage the ocean.
Conservationists(环保主义者) hope the deal will protect biodiversity in the sea. Sharks matter a great deal for this because they are usually apex animals that hunt, kill and eat other animals. That means they are at the highest point of the “food chain”—in other words, nothing else eats them. If sharks were to disappear, it would seriously impact sea life lower down the food chain, as some species’ numbers would increase fast. This could affect the weak balance of all sea life.
All biologists are not in favor of the new rule. They think that making it harder to fish for sharks will make their fins even more expensive, which would in turn encourage illegal fishing. However, Shawn Heinrichs from Only One, a group that campaigns to protect the ocean, called it “The biggest win in the history of ocean species”.
1. Why is the new rule made?A.To control the trade in sharks. | B.To protect biodiversity in the sea. |
C.To ban people from fishing for sharks. | D.To protect endangered plants and animals. |
A.Frightening. | B.Major. | C.Dangerous. | D.Top. |
A.It can prevent illegal fishing. | B.It is debatable. |
C.It does wonders for ocean species. | D.It is criticized by all the biologists. |
A.Nations Sign Up to Save Sharks | B.New Rules Benefit Biodiversity in the Ocean |
C.Sharks: Dangerous or Endangered? | D.CITES Aims to Protect Ocean Species |
【推荐2】How to deal with waste has been a problem since humans started producing it. As more and more people choose to live close together in cities, the waste-disposal problem becomes increasingly difficult.
During the eighteenth century, it was usual for several neighboring towns to get together to select a faraway spot as a dump site (垃圾填埋场). Residents or trash haulers (垃圾拖运者) would transport household rubbish, rotted wood, and old possessions to the site. Periodically some of the trash was burned and the rest was buried. The unpleasant sights and smells caused no problem because nobody lived close by.
Factories, mills, and other industrial sites also had waste to be disposed of. Those located on rivers often just dumped the unwanted remains into the water. Others built huge burners with chimneys to deal with the problem.
Several facts make these choices unacceptable to modern society. The first problem is space. Dumps, which are now called landfills, are most needed in heavily populated areas. Such areas seldom have empty land suitable for this purpose. Land is either too expensive or too close to residential neighborhoods. Long-distance trash hauling has been a common practice, but once farm areas are refusing to accept rubbish from elsewhere, cheap land within trucking distance of major city areas is almost nonexistent.
Awareness of pollution dangers has led to more strict rules of waste disposal. Pollution of rivers, ground water, land and air is a price people can no longer pay to get rid of waste. The amount of waste, however, continues to grow.
Recycling efforts have become commonplace, and many towns require their people to take part. Even the most efficient recycling programs, however, can hope to deal with only about 50 per cent of a city’s reusable waste.
1. The most suitable title for this passage would be “ _________ ”.A.Places for Disposing Waste | B.Waste Disposal Problem |
C.Ways of Getting Rid of Waste | D.Waste Pollution Dangers. |
A.recycling it | B.burying it |
C.burning it | D.throwing it into rivers |
A.farm areas willingly accept waste from the city |
B.there is cheap land to bury waste |
C.ways to deal with waste stay the same as those in the past |
D.it is no longer possible to have landfills, even in rural areas |
A.suggest a better way to get rid of waste |
B.warn people of the pollution dangers we are facing |
C.call on people to take part in recycling programs |
D.draw people’s attention to waste management |
【推荐3】There is a huge need for shark fins (鳍) in Asian countries. As a result, many sharks are caught and killed. According to reports, sharks are being killed at an shocking rate (速度) of up to 273 million worldwide every year.
Some experts predict that if the killing continues at the current rate, many shark species will be lost forever. It can be very dangerous. Sharks are very important and they should be protected.
In a study of the east coast of the United States, 11 species of sharks were eliminated from their range. Of the 14 species of ocean life that those sharks used to eat, the populations of 12 exploded and caused great damage to the ecosystem. For example, the cownose ray (鳐) population was no longer kept under control by sharks and so grew out of control. As a result, the rays destroyed the population of bay scallops (扇贝), their favorite food. The scallop fishery, which had been in good condition for over 100 years, was destroyed completely. Also, the removal of the scallops most likely had an effect on water quality as they were no longer there to perform their function (功能) of cleaning the water.
Sharks tend to eat very efficiently (高效地), going after the old, sick, or slower fish in a population, keeping that population healthy. Sharks help keep many populations of ocean life to the right size so that those prey (猎物) species don’ t do harm to the ecosystem by becoming too populated. The ocean ecosystem is made up of very complex (复杂地) food webs. For the most part, sharks are at the top of these webs and are considered by scientists to be “keystone” species, meaning that removing them may cause the whole structure to fall apart. Therefore, we should protect sharks because doing so is to protect the whole ecosystem.
1. According to the passage, in Asian, people kill sharks mainly because ________.A.sharks are dangerous for people | B.there are too many sharks |
C.shark fins are in great need | D.sharks often attack swimmers |
A.Fed. | B.Removed. | C.Charged. | D.Protected. |
A.water quality improved as well | B.bay scallops grew out of control |
C.there are more food for shark | D.the local scallop fishery was harmed |
A.They can’t find enough food to feed on. |
B.They never eat the old, sick or slower fish. |
C.Their large populations can harm the ecosystem. |
D.They play a key role in keeping the ecosystem healthy. |
Point 1 The telephone creates the need to communicate, in the same way that more roads create more traffic. My daughter comes home from school at 4:00 pm and then spends an hour on the phone talking to the very people she has been at school with all day. If the phone did not exist, would she have anything to talk about?
Point 2 The mobile phone means that we are never alone. “The mobile saved my life,”says Crystal Johnstone. She had an accident in her Volvo on the A45 between Otley and Skipton. Trapped inside, she managed to make the call that brought the ambulance (救护车) to her rescue.
Point 3 The mobile removes our secret. It allows marketing manager of Haba Deutsch, Carl Nicolaisen, to ring his sales staff all round the world at any time of day to ask where they are , where they are going, and how their last meeting went.
Point 4 The telephone separates us. Antonella Bramante in Rome says, “We worked in separate offices but I could see him through the window. It was easy to get his number. We were so near——but we didn’t meet for the first two weeks!”
Point 5 The telephone allows us to reach out beyond our own lives. Today we can talk to several complete strangers simultaneously (同时地) on chat lines (at least my daughter does. I wouldn’t know what to talk about). We can talk across the world. We can even talk to astronauts (if you know any) while they’re space-walking. And, with the phone line hooked up to the computer, we can access (存取) the Internet, the biggest library on Earth.
1. How do you understand‘Point 1 —The telephone creates the need to communicate, …’?
A.People don’t communicate without telephone. |
B.People communicate because of the creating of the telephone. |
C.People communicate more since telephone has been created. |
D.People communicate more because of more traffic. |
A.Mobile phones help people deal with the emergency. |
B.Mobile phones bring convenience as well as little secret to people. |
C.Mobile phones are so important and should be encouraged. |
D.Mobile phones are part of people’s life. |
A.the TV screen |
B.a fax machine |
C.the phone line hooked up to the computer |
D.a microphone |
A.Phone Power | B.Kinds of Phone |
C.How to Use Phones | D.Advantage of Phones |
【推荐2】“What if we treat the ocean as if our lives depend on it? Or, what if we don’t?” World-famous marine biologist Sylvia Earle poses her famous “what if” questions to inspire people to reflect on how they can help save the ocean. In 1998, Time magazine named Earle its first “Hero for the Planet.”
Earle’s move to Florida’s west coast at age 12 is what started a lifelong passion. She says, “That’s where I first fell in love with the ocean.” In 1953, using newly developed equipment, the young scientist became one of the first in her field to scuba dive (水肺潜水). Her first long-term exposure to the ocean depths came in 1970 when she led an all-female research team to study the ocean. They lived under the sea in a submersible (潜水器) for two weeks. When they returned to the surface, world-wide cheer and praise were waiting, especially for Dr. Earle.
Sylvia Earle’s career includes many firsts. In 1979 she became the first woman to walk the ocean floor 381 meters below the surface. In 1990, she became the first female chief scientist of the U.S. National Oceanic and Atmospheric Administration (NOAA).
Through the years, Earle has spent roughly 7,500 hours underwater. During that time, she has become increasingly alarmed by the significant changes she has observed.
The famous scientist fears that the ocean is dying. Climate change, overfishing, the dumping of trash and chemicals and oil spills are just some of the many causes. In order to tackle the problem, Earle formed Mission Blue in 2009. This organization promotes the legal protection and conservation of the world’s oceans. Her plan is to develop “Hope Spots,” protected areas large enough to reverse (逆转) damage and restore the ocean.
1. Why does Sylvia Earle put forward “what if” questions?A.To call on people to protect the ocean. |
B.To stress our dependence on the ocean. |
C.To criticize people’s damage to the ocean. |
D.To contribute an article to Time magazine. |
A.She moved to Florida to learn diving. |
B.She was the best in scuba diving. |
C.She did not get much attention in 1970. |
D.She became a chief scientist of NOAA in 1990. |
A.Scientists’ fears. | B.Causes of the damage. |
C.Efforts Earle made. | D.Bright future for the ocean. |
A.Dr. Sylvia Earle — A Lover of Diving |
B.Dr. Sylvia Earle — Pioneer of the Deep |
C.The Ocean — A place in Urgent Need of Our Care |
D.Scuba Diving — A Fantastic Way to Learn the Ocean |
【推荐3】A 2017 Gallup poll reported that 43% of employed Americans had spent at least some time working remotely, and the US Census data released in 2018 reported 5.2% of US workers being based entirely at home.
Even as working from home (WFH) becomes relatively commonplace, a new form of remote work is emerging: working from anywhere (WFA), in which employees can live and work where they choose, typically within a specific country, but in some cases, anywhere in the world with a reliable Internet connection. While many companies are just starting to consider allowing employees to work from anywhere, developed WFA programs can be found at firms such as Akamai Technologies Inc. and SAP SE.
Employees value the option to work remotely. A 2017 study even found that the average worker was willing to accept 8% less pay for the option to work from home. And with a work-from-anywhere policy, employers add even more value to employees by granting geographic flexibility. There is the significant difference: while a WFH employee can choose to pick the kids up from school or spend the lunch hour walking the dog, a WFA employee can do all of those and also relocate closer to aging parents or to a location with a lower cost of living.
In our experience, however, managers often worry about remote employees working less, multitasking, or mixing personal responsibilities with work. There are also concerns that allowing employees to work from anywhere could decrease communication and collaboration (合作) among co-workers and might limit the informal learning that typically happens in the office.
But one 2015 study by a Chinese travel agency found that when call center employees were shifted to working from home, their productivity increased by an average of 13%, apparently due to a reduction in break time and sick days combined with a more comfortable working environment. This finding raises the question: could employees in a work-from-anywhere program also benefit from similar productivity increases?
1. What does the underlined word “emerging” in the second paragraph mean?A.Coming into existence. | B.Getting more popular. |
C.Coming to an end. | D.Drawing attention. |
A.Picking the kids up from school. | B.Relocating closer to aging parents. |
C.Spending the lunch hour walking the dog. | D.Working more effectively. |
A.It is more relaxing. | B.It is more flexible. |
C.It is more productive. | D.It is more stressful. |
A.What’s the difference between WFA and WFH? |
B.Do you prefer WFA or WFH? |
C.Is it time to let employees work from anywhere? |
D.Who are suitable for WFA and WFH? |