The San Francisco-based company, called Living Carbon, has created poplar (杨树) trees that are genetically engineered (改变基因结构) to grow larger and suck up more carbon dioxide from the atmosphere than standard trees do. In February, workers planted rows of these poplars in southern Georgia. The company intends to plant 4 to 5 millions trees by the middle of next year, which they say will help with the worsening climate crisis.
When plants photosynthesize (进行光合作用), they convert carbon into sugar and nutrients that are eventually consumed by all living organisms. But they also produce a harmful byproduct, which must be broken down during the energy-intensive process of photorespiration (光呼吸), said Yumin Tao, the company’s vice president of biotechnology.
“This is not only wastes energy but also loses much fixed carbon in the form of CO2, which gets released into the air again,” Tao added. “It’s a wasteful process many plants do.” Living Carbon has reduced photorespiration in its poplars, instead channeling the energy into growth, he says.
The trees have three genes inserted to achieve this, including one from squash and one from green algae. But the company has yet to show its modified trees can capture more carbon in a real — world setting. Its only publicly available data comes from a study in a greenhouse that lasted for only a few months and has yet to be peer reviewed. “Their claims seen bold based on very limited real-world data,” says Andrew Newhouse, a conservation biologist at the SUNY College of Environmental Science and Forestry.
Still, the study reported the modified poplars grew as much as 53% larger in five months compared to the unmodified ones, capturing 27% more carbon dioxide. Now, the company hopes its other field trials in locations like Oregon and Pennsylvania will show similar successes. It’s currently focused on planting on private lands, where fewer roadblocks exist.
“We specially focus on land where trees otherwise wouldn’t be planted, like abandoned mine lands-areas where there isn’t an existing, rich ecosystem that’s allowing for a large amount of carbon removal right now,” says Maddie Hall, Living Carbon’s CEO.
1. Why does the company want to plant genetically modified poplars?A.To help with the worsening climate crisis. |
B.To better study them to gain more accurate data. |
C.To replace ordinary poplars with genetically modified poplars. |
D.To find suitable places for genetically modified poplars to grow. |
A.Disapproving. | B.Ambiguous. | C.Skeptical. | D.Supportive. |
A.They are very resistant to carbon. | B.They have a growth advantage. |
C.They have two genes inserted. | D.They photosynthesize even faster. |
A.A Company Is Trying to Engineer Trees Genetically |
B.Poplar Trees Might Be Planted All Around the World |
C.Genetically Modified Trees Are Taking Root to capture Carbon |
D.Research Is Being Conducted to Use Trees to Remove CO2 |
相似题推荐
【推荐1】Given how valuable intelligence and automation are, we will continue to improve our technology if we are at all able to. At a certain point, we will build machines that are smarter than we are. Once we have machines that are smarter than we are, they will begin to improve themselves. The concern is really that we will build machines that are much more competent than we are. And the slightest divergence (分歧) between their goals and our own could destroy us.
Just think about how we relate to ants. We don’t hate them. We don’t go out of our way to harm them. In fact, sometimes we take pains not to harm them. We step over them on the sidewalk. But whenever their presence seriously conflicts with one of our goals, we will kill them without hesitation. The concern is that we will one day build machines that, whether they’re conscious or not, could treat us with similar disregard.
The bare fact is that we will continue to improve our intelligent machines. We have problems that we desperately need to solve. So we will do this, if we can. The train is already out of the station, and there’s no brake to pull. If we build machines that are more intelligent than we are, they will very likely develop in ways that we can’t imagine, and transcend us in ways that we can’t imagine.
So imagine we hit upon a design of super intelligent AI that has no safety concerns. This machine would be the perfect labor-saving device. It can design the machine that can build the machine which can do any physical work, powered by sunlight, more or less for the cost of raw materials. So we’re talking bout the end of human labour. We’re also talking about the end of most intellectual work. So what would apes like ourselves do in these circumstances?
But the moment we admit that information processing is the source of intelligence, we have to admit that we are in the process of building some sort of god. Now would be a good time to make sure it’s a god we can live with.
1. Why does the author mention ants in Paragraph 2?A.To compare intelligent machines to ants. |
B.To show improved machines will get away from us. |
C.To stress the presence of machines does conflict with our goals. |
D.To explain future intelligent machines could treat us without mercy |
A.Disable. | B.Inspire. | C.Disappoint. | D.Outpace. |
A.By making comparisons. |
B.By giving assumptions. |
C.By showing valid evidence. |
D.By analyzing statistics |
A.Human beings will no doubt be destroyed by AI in the future |
B.Super intelligent AI will put an end to human labour eventually. |
C.We should keep the development of AI within humans’ control. |
D.Human beings should stop the development of super intelligent AL. |
【推荐2】More than ten years after introducing “Google Glass”, Alphabet Inc. has created a new kind of smart eyeglasses. The company says the wearable computer device can translate different languages in real time.
A working model of the yet-unnamed device was presented to the public last month during the yearly Google conference. Google did not say when the glasses might go on sale to the public.
The previous Google Glass device included a wearable camera that could film what the wearers saw. That caused widespread privacy concerns. The camera element also gave Google Glass a kind of science-fiction look. The latest device looks more similar to traditional glasses.
A brief demonstration of the new eyeglasses described its translation ability, but did not provide additional details. The company also did not say whether the new device would be equipped with a camera. A demonstration explained that a person, wearing the glasses and talking with someone who speaks a different language, can see the spoken words in their own language. The description showed translations including English, Mandarin, Spanish and American Sign Language.
The new device is one of several products shared at the conference that are currently in development. The company says the products aim to better connect Google services with activities happening in the real world. This includes company offerings for searching and viewing maps, as well as other services using the latest developments in artificial intelligence (AI).
Eddie Chung, a director of product management at Google, spoke to developers about the new eyeglasses. “What we’re working on is technology that enables us to break down language barriers, taking years of research in Google Translate and bringing that to glasses,” he said. “Apart from breaking down language barriers, another use of these translating glasses is enabling communication with people who are deaf or hard of hearing. While these glasses might not be a revolutionary product like Google Glass, they could provide a relatively simple solution to a real-world problem.”
1. What can we learn about the latest smart eyeglasses?A.They will be equipped with a camera. |
B.They will appear on the market next year. |
C.They can help users communicate easily. |
D.They have a kind of science-fiction look. |
A.To share a wearable computer device on sale. |
B.To introduce a new product in development. |
C.To advertise the smart eyeglasses for sale. |
D.To show the development of Google Glass Device. |
A.A Japanese who will talk with some Frenchmen. |
B.Professors who research on native languages. |
C.Tourists who search and view maps in Germany. |
D.An American deaf boy who will listen to a speech. |
A.Favorable. | B.Doubtful. | C.Opposed. | D.Disappointed. |
【推荐3】While jewelry made from gold can be beautiful, most people admit that wearing the heavy metal over long periods of time can get a little annoying. Now, researchers from Swiss university ETH Zurich have created a new form of lightweight gold that weighs five to ten times less than traditional 18-carat gold—which typically consists of 75 percent gold and 25 percent copper—but has the same purity.
The researchers began by mixing gold with water, salt, protein fibers and other materials. They then replaced the water with alcohol and placed the mixture inside a high-pressure carbon dioxide (CO2) box. The reaction between the gas and alcohol transformed the golden plastic into a light material that can be heated to melt and made into whatever form was needed. "This gold has some characteristics of plastic,” says team leader Raffaele Mezzenga, professor of Food and Soft Materials at ETH Zurich.
In addition to being lighter, the "plastic” gold has other advantages over traditional forms. It can be melted into shape at about 105 degrees Celsius, much lower than the 1,064 degrees Celsius required to melt pure 24-carat gold. The metal's firmness can be easily adjusted by changing the components at the beginning of the process. It is also much easier to vary the color. "As a general rule, our approach lets us create almost any kind of gold we choose, in line with the desired properties, says Mezzenga.
The researchers, who published their study in the journal Advanced Functional Materials on January 10, 2020, believe the new lightweight gold will be able to replace the metallic version in most traditional applications, including jewelry and watches. However, given that most buyers associate high-quality gold with weight, that may take some time. But the material will undoubtedly be beneficial for use inside electronic devices, chemical catalysts (催化剂),and even radiation shielding.
1. Why do many people find the traditional gold annoying?A.It costs too much。 |
B.Its purity is too low. |
C.It feels too heavy to wear long. |
D.Its beauty lasts a short time, |
A.The functions of the "plastic" gold. |
B.The components of the "plastic” gold. |
C.The characteristics of the "plastic” gold. |
D.The production process of the "plastic" gold. |
A.It is easier to process. |
B.It is more widely used. |
C.It has a lower temperature. |
D.It is more convenient to get. |
A.A diary. | B.A guidebook. |
C.A novel. | D.A magazine. |
【推荐1】Inner Mongolia Autonomous Region is an important ecological screen for the north of China and even the whole country. Building a green great wall to ensure China’s ecological security is one of the most important things of autonomous region.
The largest ecological function zone in the north of China, Inner Mongolia has a variety of landscapes, including forests, grasslands, wetlands, rivers and lakes. In recent years, the region’s environment has improved, with its forest and grassland area having increased and desert reduced.
However, it still faces a number of challenges in ecological preservation. For instance, the region faces severe water shortages with the number of lakes dropping from 427 in 1987 to 145 in 2010. In addition to a lack of rainfall, huge water consumption in agricultural and industrial production has worsened the water shortage. Too much use of fertilizers has damaged the soil and affected the growth of grass, accelerating the expansion of the desert, which results from a lack of water.
The local government encourages planting trees on grassland as they can get more pay for trees than by growing grass. However, the trees they plant often have a low survival rate as they have a high water consumption rate. Also, to treat wetlands, some areas have planted a large number of a single tree species. This practice may damage biodiversity (生物多样性) and endanger the survival of certain animals.
Experts suggest taking the region’s water resources and weather conditions into consideration in future ecological projects.
1. What do we know about the green great wall in Inner Mongolia Autonomous Region?A.It adds the beautiful scenery to this area. |
B.It acts as a guard to protect the north of China. |
C.It works well in saving the endangered animals. |
D.It contributes to the decrease of the grassland. |
A.The causes of water shortages. | B.The protection of ecological environment. |
C.The solutions to water shortages. | D.The importance of ecological environment. |
A.weakening | B.shortening |
C.lessening | D.quickening |
A.To tell the function of the green great wall. |
B.To introduce the green great wall to the readers. |
C.To provide guidance on traveling around Inner Mongolia. |
D.To offer some advice on building the green great wall. |
【推荐2】Think about the different ways that people use the wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources, as well as one of the oldest. Something shows that windmills (风车) began to be used in ancient Iran back in the seventh century BC. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power.
For many centuries, people used windmills to grind (磨碎) wheat into flour or get water from deep underground. When electricity was discovered in the late 1800s, people living in faraway areas began to use them to produce electricity. This allowed them to have electric lights and radio. However, by the 1940s when electricity was available to people in almost all areas of the United States, windmills were hardly used.
During the 1970s, people started becoming more cared about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would run out one day. Then, wind was rediscovered, though it means higher costs. Today, there is a global movement to supply more and more of our electricity through the use of wind.
1. What was a new use for wind power in the late 19th century?A.Sailing a boat. |
B.Producing electricity. |
C.Grinding wheat into flour. |
D.Pumping water from underground. |
A.wind power is cleaner |
B.it is one of the oldest power sources |
C.it was cheaper to create energy from winds |
D.the supply of coal and gas failed to meet needs |
A.The advantage of wind power. |
B.The design of wind power plants. |
C.The movement to save energy. |
D.The global trend towards producing wind power. |
【推荐3】Many experts are calling the growing problem of global waste a worldwide health crisis in since pollution from trash is not only harming the world’s oceans, air and soil but also endangering people’s health as well as the livelihood of all living creatures.
Reduce, reuse, recycle
Such a dilemma raises the question, is there a more responsible way of dealing with trash? Fortunately, there is.
Circular economy
Traditionally, manufacturers would make a product to be used and disposed of by consumers. This linear (直线型的) model of production offered no help in the fight against global waste.
Once a product’s value is exhausted, the materials are recycled and returned to manufacturers. The outcome is less waste. One large-scale example of this is happening on the island of Taiwan.
In 1997, Taiwan established its signature 4-in-1 Recycling Program, consisting of communities, government cleaning teams, recycling companies and the Recycling Fund. Residents separate their recyclable waste. The local government collection teams collect it.
Turning garbage into gold
By following a circular system, more products than ever are being manufactured using recycled materials. Environmentally-friendly decisions like these help to conserve natural resources, reduce pollution, save landfill space and even create new job opportunities.
A.Practices in Taiwan |
B.4-in-1 Recycling Program |
C.Recycling can truly turn garbage into gold |
D.Living a zero-waste lifestyle is the way to go |
E.Alternatively, a circular economy was introduced |
F.The recyclable waste is recycled in many local factories |
G.Recycling companies buy waste materials from them to make profits |
【推荐1】Having spring around makes you feel different after such a long winter journey. The power of sunshine brings us a lot of comfort, optimism, self-confidence and of course a smile. Imagine how great it will be if we are so positive all year round!
Living like this is possible if you really think about it. In order to exist in such a state of happiness, we must have sunshine radiating from within ourselves, shining from our hearts, minds and souls. Actually, that's your choice, and if you think that way then your own life will reflect that attitude of yours!
In order to make “sunshine” or rather “light” part of our being, it is so important that you watch your thoughts, your words and your actions so that you will accept what you really feel you'd like to create in your own life. Watch your thoughts and really become aware of how many negative thoughts pass through your mind about yourself and other people around you. Watch to see how often you gossip ( 说 闲 话 ) about other people, which is actually often attached with feelings of jealousy (妒忌) and insecurity(不安全感) about yourself.
You are also supposed to take a close look at your “intention”. How many of you do something for another person without expecting to receive something in return? It might not even have to be a material or physical thing you expect; expecting to be recognized for what you have done is enough to create conditions on your intention. Think about it!
Putting all of these together, it seems that most of us are creating monsters inside us just by simply talking, thinking and not putting our heart out with the right intention towards helping someone else. If you take all your negative attitudes in one hand and measure your need to feel “sunshine” in the other, you will see how both these elements really contradict each other.
Be brave and break your patterns and your habits this spring, and by doing so, you will allow the true sunshine to take place by radiating out from your heart and into your life and the lives of the people around you!
1. You can have sunshine shining from your inside .A.by watching what you think, say and do |
B.by helping someone else |
C.by measuring what you need |
D.by changing your intention |
A.expect to be recognized for what you've done |
B.take a close look at your intention |
C.gossip about other people |
D.become aware of your negative thoughts |
A.Breaking our patterns is the most important to get true sunshine. |
B.Expecting something in return for our help isn't the right intention. |
C.If we don't intend to help others, we create monsters inside us. |
D.Negative attitudes have little to do with happiness. |
A.stress the importance of the positive lifestyle |
B.analyze the intentions and thoughts in our mind |
C.warn us about the bad effects of negative attitudes |
D.offer advice on having sunshine from our inside |
【推荐2】When comparing U.S. and Chinese schools,despite(尽管)many differences, one finds a number of unexpected similarities.
Students in both countries, in some ways, have much in common. This includes their experiences with popular culture like technology and social media, mutual care for the environment, and the fact that all were terribly influenced by COVID-19.
Students in both countries belong to what might be described as a“TikTok culture,”although this Chinese app is likely more popular in the U.S. than in China itself.The Chinese term kuaicanshi yule,which means fast-food type entertainment, is the better expression, one that conveys“snackable content”for often meme-oriented, fast moving fashion that compete for short attention spans. Whatever the app or device, students have been much influenced by technology, positively and negatively. In fact,Chinese students do face more controls from their schools about their use of social media, although many are good at finding ways to avoid them.
Furthermore, many students in both countries are attracted to similar styles, in both fashion and food, in music and film, with Chinese and American students often being similarly up-to-date on the latest hits, including television series.
Finally, what both have most in common is the strong wish to live a good life, be successful and secure. The U.S. and China approach these wishes in different ways educationally, but both could learn from each other. This is especially true given the fact that we all live in an increasingly globalized world, and must learn to work together to solve not only global problems like climate change and disease outbreaks, but unfortunate frictions between the U.S. and China. Indeed, with the last point in mind, a significant weakness in the educational systems of both countries is that neither really understands the other. This is not a new problem, but solving it needs serious attention.
1. What can we learn about the students in the U.S. and China from Paragraph 2?A.They show no interest in traditional culture. |
B.They have chances to experience social media. |
C.They are satisfied with their living environment. |
D.They were hardly influenced by COVID-19. |
A.Rules to control. |
B.Supports from parents. |
C.Agreement from schools. |
D.Risk to leave. |
A.Schools stop them from using social media. |
B.They have little interest in television series. |
C.They achieve their wishes educationally similarly. |
D.They can't fully understand each other educationally. |
A.U.S.and Chinese Schools |
B.U.S.and Chinese Students |
C.Similarities between U.S. and Chinese Students |
D.Differences between U.S. and Chinese Schools |
【推荐3】Sitting on the edge of the world, Sydney is considered as one of the world’s greatest cities for a reason. Want to relax yourself in Sydney? This shortlist of things to do and see in Sydney should point you in the right direction.
Hit the beaches
Everyone knows about Bondi Beach and its Icebergs pool, restaurants and the crashing waves are the postcard image of Sydney. Bondi is a great place to start. But after you’ve caught some sun or taken a surf lesson with Let’s Go Surfing, we’d suggest taking the Coogee Coastal Walk. Beginning at the Bondi Icebergs swim club, the 3.7-mile walk affords amazing cliffside views of rock pools and bays.
Catch a show
Sydney is full of events and performances every night of the week. The first place that jumps to mind is the iconic Sydney Opera House, designed by Jorn Utzon. A UNESCO World Heritage site, this incredible piece of architecture doesn’t just do opera. You’ll also find stand-up comedy. ballets, and more. But it’s not the only place in Sydney putting on a show. The 1920s State Theatre, in the central business district, is known to host international ballets, concerts and world-class orchestras.
Go to the zoo
From the skyline views to the charming grounds, there’s a reason why Sydney’s Taronga Zoo attracts more than I million visitors every year. The expansive space plays host to more than 4,000 animals, including tigers, giraffes, kangaroos, platypus, koalas, Komodo dragons, elephants, lions, chimps and more. Love it so much that you never want to leave? Stay the night in one of its luxury safari (狩猎) tents.
Climb the bridge
Nicknamed “the coat hanger”, the Sydney Harbour Bridge opened in 1932. Like the Sydney Opera Houses it was an engineering-masterpiece than was way ahead of its time. Sure, you can walk or cycle across the bridge, but the best way to appreciate the architectural wonder is up close and personal.
1. What can you do at Bondi Beach?A.Enjoy an outdoor concert. | B.Appreciate incredible architecture. |
C.Enjoy cliffside views. | D.Cycle along the Coogee Coast. |
A.It surely costs you much to stay overnight. | B.It is located nearby Sydney. |
C.It provides home for many animals. | D.It hasn’t gained in great popularity. |
A.They both hold operas. |
B.They are engineering classics. |
C.They were built in the 19th century. |
D.They are on the UNESCO World Heritage list. |
【推荐1】How to Make a Window Box Garden
For many people, warm weather means growing things in the ground. Gardening is a popular activity all around the world. But what about people who do not have the space to garden? Don’t worry! Today, we will give you information about growing beautiful window boxes.
Place and safety
Light and water
Before choosing plants, check your window box place for light and rain.
Try to be different
So, what makes some window boxes different while others are just so-so? Create a topic!
A.This is a main idea for the plants. |
B.Besides having a topic, caring is important. |
C.Window boxes dry out faster than ground plants. |
D.You should not let quick-growing plants get out of control. |
E.She suggests knowing which plants look best during each season. |
F.Window boxes are not just for the outside edge of the window. |
G.She gets a great look by using plants and flowers that don’t need much sun. |
【推荐2】Many fruit trees and bushes are very simple to plant using no equipment except some potting soil and a heating equipment. In fact, you can get a handful of cuttings for free from a friend during pruning (修剪) season and end up with a whole homemade fruit farm.
Grapes
They are the first easy species on my list because they will grow in most parts of the US and are easy to root from hardwood cuttings. Hardwood cuttings are pieces of one-year-old wood taken in the late winter before the buds start to grow.
Figs
They are just easy to root, but I put them second on my list because northerners will have a hard time keeping the plants alive. If you live party way north, you can grow figs as long as you choose a cold-hardy variety.
Rabbiteye blueberries
They are an example of another kind of self-rooting plant. After a few years, it will begin to send up suckers from near the base. The suckers that are at least a few inches away from the parent plant will generally grow roots a year after emerging, at which point you can dig down until you’ve found several roots.
Gooseberries
They are simple because they just about root themselves. If you allow (or force) one branch to grow along the ground, then cover part of the branch with rich soil, roots will grow on the underwater part. Cut their stems off next year and you’ll have one or more gooseberry plants to set out elsewhere.
1. What makes grapes the first easy species on the author’s list?A.Their high production. | B.Their delicious and special taste. |
C.Their great economic value. | D.Their strong adaptability to grow. |
A.After growing along the ground. |
B.Before covering part of the branch. |
C.After cutting their stems the next year. |
D.Before roots grow on the underwater part. |
A.Science. | B.Gardening. | C.Fashion. | D.Entertainment. |
【推荐3】Students at Beijing’ s Yucai High School have to be very careful when playing football on the school’ s field. That’ s because there is a 100- year-old tree growing in the middle of it. And keeping their eye on the ball too much can result in a painful collision.
Building a football field around a tree sounds pretty stupid. But the school had no choice. It’ s reported that there are historic buildings all around Yucai High School, and this was the only space that could be used for a football field. Before starting working on the field, the school did ask to have the tree moved and planted somewhere else. However, they were told that it was hundreds of years old, and that it was a national treasure.
Having it moved and planted somewhere else was too risky—they might damage or kill the tree. So they were 1eft with no choice but to build the field around it.
Interestingly, Yucai High School is built on the grounds of Beijing’s Royal Gardens of the Ming and Qing dynasties. A reporter for the Beijing News believes that the strangely- located tree is the oldest tree in the Chinese capital. That information has not been checked, but other people think the tree is only 100 years old.
Playing a serious game of football on this field cannot be very pleasant. The tree could“catch” the ball and change its direction from time to time. But the students have no choice but to train on the playground with the tree. Luckily, they can play on a different field in competitions with other schools.
1. If students play football on the school field,________.A.they might run into a tree | B.they will have a good chance of winning |
C.they will fall down more often | D.they can control the ball all the time |
A.Because the tree was as old as the school. |
B.Because the school could only use that place. |
C.Because students in the school liked the tree. |
D.Because the tree had something to do with the city’s history. |
A.Because there was no other place for the tree. |
B.Because it may have been dangerous for the tree and it might have died. |
C.Because the tree was too big to be moved. |
D.Because it was more meaningful to keep the tree where it was. |
A.It’s the oldest tree in the Chinese capital. |
B.It was planted in Ming Dynasty. |
C.Some believe it is only one-hundred years old. |
D.Students will play on another field to protect it. |