1 . The Internet’s carbon footprint is as bad as air travel. While it is difficult to measure precisely, estimates place it at over two percent of global greenhouse gas emissions(排放)—the same as the air travel.
Information may appear to spread around the world unseen to our eyes, but it actually passes through enormous data centers placed strategically about the globe, which store, organize and deliver everyone’s data. These centers are extremely energy intensive. In the EU, they consume close to three percent of its total energy usage and also require lots of water to prevent their computers from overheating. In the US, about a fifth of data centers draw water from already stressed water sources.
A typical spam email(垃圾邮件)emits around 0.03g of CO2 emissions, though longer messages read on a laptop can go all the way up to 26g. Now multiply that by 333 billion(roughly the number of emails that get sent every day in 2022). That puts all those work emails into perspective. One study found if every British adult sent one less “thank you” email a day, it would save 16, 433 tons of carbon a year. It even predicted that the ICT industry could account for up to a fifth of the world’s energy consumption by 2025.
However, there are measures that we can take to reduce our digital carbon footprint. For instance, you can unsubscribe from marketing and other spam emails and only subscribe to newsletters that you still regularly read. Have regular data checks where you delete old contact lists and other documents that no longer have any use. Keep a clean inbox and delete emails you no longer need.
1. Why does the author make a comparison in the beginning?| A．To present the digital carbon footprint. |
| B．To emphasize the importance of air travel. |
| C．To advise people not to travel by airplane. |
| D．To inform the disadvantages of the Internet. |
| A．It enjoys a wide popularity. |
| B．It has various kinds of functions. |
| C．It causes large energy consumption. |
| D．It has quite a complex mode of operation. |
| A．To draw the readers’ attention. |
| B．To illustrate a certain information. |
| C．To highlight the change of CO2 emission. |
| D．To stress the importance of reducing CO2 emission. |
| A．Neutral. | B．Optimistic. |
| C．Unfavorable. | D．Concerned. |
2 . Monkfish are low in calories and they are easy to cook. They can be cut into pieces, mixed with egg whites, cornflour and salt, and then put into boiling water for a few minutes. There is only one problem with monkfish: they are ugly. With their eyes sticking out and wide mouths full of sharp teeth, they are frightening.
In the Netherlands, fishermen who caught them used to throw them back. They are still usually sold without their heads, but the days of throwing them away are long gone. Japanese diners love the fatty liver; while Italians may still call them toad tails, that doesn’t stop them from eating the fish. People have been encouraged to eat more monkfish, as well as other unattractive creatures — in order to ensure the biodiversity of the ocean environment.
There are more examples for sea animals going from “purposely avoided” to “willingly consumed”. In America, lobsters used to be fed to prisoners — a result of their abundance but also, no doubt, because they are difficult to eat and look frightening. Not until the late 19th century did they become fantastic dish. Today they are so desirable that Maine, where most American lobsters are caught, has the images of these creatures printed on many of its vehicles.
Sometimes fashion goes the other way. Turtles were plentiful in early America, but in the 19th century they became fashionable: few foods were more recommended than turtle soup. Americans ate some species of turtle nearly to extinction. Yet today turtle-eating is more closely associated with remote and uncultured areas.
Among cooking choices, people prefer the rare and the beautiful one than the unattractive one. But such narrow-minded food choices can have bad results: some species may not survive human preference for them. Better to stare into monkfish’s eyes than to contribute to the permanent loss of a species.
1. How were monkfish treated in the Netherlands?| A．They were abandoned by local fishermen. | B．They were popular due to their fatty livers. |
| C．They were called toad tails from time to time. | D．They were considered a danger to the ecosystem. |
| A．To stress its abundance in America. | B．To make a comparison with monkfish. |
| C．To prove prisoners used to be fed on seafood. | D．To show people’s food habits keep changing. |
| A．Turtle-eating has been out of date now. |
| B．Turtles have completely disappeared in America. |
| C．Turtles were purposely avoided among food choices. |
| D．Turtle-eating was against fashion in the 19th century. |
| A．To introduce rare undersea wildlife. | B．To encourage people to eat seafood. |
| C．To explain why people dislike monkfish. | D．To call for the protection of biodiversity. |
3 . As the planet gets hotter, the need for cool living environments is becoming more urgent. But air conditioning is a major contributor to global warming since units release powerful greenhouse gases and use lots of energy.
Now, researchers from McGill University, UCLA and Princeton have found in a new study an inexpensive, sustainable alternative to mechanical cooling with refrigerants (制冷剂) in hot and dry climates, and a way to relieve dangerous heat waves during electricity blackouts.
The researchers set out to answer how to achieve a new benchmark (基准) in passive cooling inside naturally conditioned buildings in hot climates such as Southern California. As an attempt, they examined the use of roof materials that radiate (辐射) heat into the cold universe, even under direct sunlight, and how to combine them with temperature-driven ventilation (通风). These cool radiator materials and coatings are often used to stop roofs overheating. Researchers have also used them to improve heat rejection from chillers. But there is untapped potential for integrating them into architectural design more fully, so they can not only reject indoor heat to outer space in a passive way, but also drive regular and healthy air changes.
“We found we could maintain air temperatures several degrees below the current surrounding temperature, and several degrees more below a reference ‘gold standard’ for passive cooling,” said Remy Fortin, lead author and PhD candidate at the Peter Guo-hua Fu School of Architecture. “We did this without sacrificing healthy ventilation air changes.” This was a considerable challenge, considering air exchanges are a source of heating when the aim is to keep a room cooler than the outside.
The researchers hope the findings will be used to positively impact communities suffering from dangerous climate heating and heatwaves. “We hope that materials scientists, architects, and engineers will be interested in these results, and that our work will inspire more complete thinking for how to integrate breakthroughs in radiative cooling materials with simple but effective architectural solutions,” said Remy Fortin.
1. What might cause researchers to look for an alternative to air conditioning?| A．The severe shortage of energy. | B．The greenhouse effect of air conditioning. |
| C．The increasing dangerous heatwaves. | D．The need for cool living environments. |
| A．To obtain ideas for their research. | B．To prevent roofs from overheating. |
| C．To find the best material for roofs. | D．To make roofs well ventilated. |
| A．Uncaring. | B．Disapproving. | C．Positive. | D．Worried. |
| A．An effective architectural solution |
| B．A major contributor to global warming |
| C．A sustainable alternative to air conditioning |
| D．A more complete thinking for cooling materials |
4 . The heavy use of fossil fuels over the last 150 years has released massive amounts of greenhouse gases, which has caused the Earth to warm up. Scientists say large amounts of CO2 must be removed from the atmosphere and stored. Plants and trees do this naturally. But there’s so much CO2 in the atmosphere that just planting trees and protecting forests won’t solve the problem. And, when these plants and trees die, the carbon they’ve stored gets released again. That means humans need to come up with ways of removing carbon from the air and storing it. This is called Direct Air Capture(DAC).
A company called Heirloom has just opened the first DAC plant in the United States. Heirloom’s process uses limestone to capture CO2. The company heats up the limestone to separate out the CO2, which is then locked away in concrete. Heirloom uses renewable electricity to produce the heat, so the process doesn’t produce more CO2. The process is extremely expensive though. The new plant can remove 1,000 tons of CO2 a year. That’s a tiny amount compared to how much carbon needs to be removed from the atmosphere.
Graphyte is another US company working on DAC. The company collects unwanted plants. It dries this “biomass” completely so that it can’t break down. Graphyte then strikes the dried plants into small bricks which are trapped in a special wrapper and buried deep underground. Graphyte says its process doesn’t use much energy and can work anywhere. The company claims the cost is merely less than $100 to capture a ton of CO2.
Not everyone is excited about carbon removal. Some people worry that it will take too long to make a difference. Others worry that focusing on removing carbon could take attention away from more important climate actions, like switching from fossil fuels to renewable energy. But experts say the decision isn’t to do one or the other. The world needs to end fossil fuel use and pull carbon out of the air.
1. What can be the impact of the death of plants according to Paragraph 1?| A．Their leaves take in more carbon. |
| B．There is an increase of carbon in the air. |
| C．It leads to the death of animals dependent on them. |
| D．The carbon they absorb disappears with their death. |
| A．A course studying the atmosphere. |
| B．An association dealing with climate change. |
| C．A new method beneficial for the environment. |
| D．A newly developed material for a greener world. |
| A．Its operation procedures are simpler. | B．It achieves its goal at a lower expense. |
| C．Its products are intended for construction. | D．It works with the aid of renewable energy. |
| A．It’s necessary to work along both lines. | B．Carbon removal is a win-win solution. |
| C．Environmental issues are about to be resolved. | D．Advantages always coexist with disadvantages. |
1. Why are all participants dressed in green?
| A．To look young and energetic. |
| B．To match the theme of the campaign. |
| C．To keep the team easily manageable. |
| A．Planting trees. | B．Designing posters. | C．Collecting garbage. |
| A．Organize the campaign. |
| B．Stop driving cars. |
| C．Drive students to do activities. |
| A．Repair lights. | B．Decorate classrooms. | C．Paint school boards. |
The color of the ocean has changed
More than 56% of the world’s oceans have changed color,
Tropical (热带的) oceans close to the equator
“
Though the researchers are still working to understand exactly
The researchers studied changes in ocean color from space by
7 . Eating too much fatty food, exercising too little and smoking can raise your future risk of heart disease. But there is another factor that can cause your heart problems more immediately: the air you breathe.
Previous studies have linked high exposure (暴露) to environmental pollution to an increased risk of heart problems, but two analyses now show that poor air quality can lead to heart attack or stroke (中风) within as little as a few hours after exposure. In one review of :he research, scientists found that people exposed to high levels of pollutants (污染物) were up to 5% more likely to suffer a heart attack within days of exposure than those with lower exposure. A separate study of stroke patients showed that even air that the U. S. Environmental Protection Agency(EPA) considers to be of “moderate” (良好) quality and relatively safe for our health can raise the risk of stroke as much as 34% within 12 to 14 hours of exposure.
The authors of both studies stress that these risks are relatively (相对地) small for healthy people and certainly modest compared with other risk factors such as smoking and high blood pressure However, it is important to be aware of these dangers because everyone is exposed to air pollution regardless of lifestyle choices. So stricter regulations by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.
1. The text mainly discusses the relationship between ________.| A．heart problems and exercising |
| B．heart problems and smoking |
| C．heart problems and fatty food |
| D．heart problems and air quality |
| A．Relatively high. | B．Relatively low. | C．Too low. | D．Too high. |
| A．Stricter regulations on pollutants should be made. |
| B．Eating fatty food has immediate effects on your heart. |
| C．The EPA did many studies on air quality. |
| D．Moderate air quality is more harmful than smoking. |
| A．introduce | B．describe | C．entertain | D．persuade |
8 . Wildlife Preservation Volunteer Programs
Elephant Preservation Volunteer Program in Nepal
This program is suitable for active volunteers who love animals and want to care for the well-being of elephants. No experience is needed as you’ll be working closely with placement staff. The elephant shelter takes in elephants that have medical issues and require care.
Volunteers are accommodated in a local hotel. You should expect to share a room with one other volunteer.
Marine (海洋的) Preservation Volunteer Program in Croatia
This program is suitable for physically fit volunteers who are experienced divers (潜水员). You will use your diving skills to collect marine waste from the bottom of the seabed. You will work within a team on sorting waste out and handing it to the recycling centre.
Volunteers will be accommodated in a hotel. Local workers will clean the accommodation throughout the week.
Victoria Falls Wildlife Volunteering in Zimbabwe
This program is suitable for animal-loving volunteers who want to contribute to protecting amazing creatures and their habitats. Activities include animal tracking, camping out on the reserve and supporting other partner organizations.
Volunteers are accommodated within private rooms at the preservation centre. The accommodation has an open-air area where volunteers can socialize.
Amazon Jungle Preservation Volunteer Program in Peru
This program is suitable for volunteers who care about the environment, like working hard and don’t mind getting their hands dirty. It’s a great opportunity if you’re looking to reset your life by getting out of your comfort zone. You’ll also be developing personally and professionally.
Volunteers are accommodated in local people’s houses. There are running showers but you can expect water to he cold.
1. What do the programs in Nepal and Zimbabwe have in common?| A．They need experienced volunteers. |
| B．They are suitable for animal lovers. |
| C．They include dirty work in the field. |
| D．They require camping out on the reserve. |
| A．They work on the seabed all the time. |
| B．They help to keep the environment clean. |
| C．They are taught diving skills after arrival. |
| D．They lead a team to explore the marine creatures. |
| A．Elephant Preservation Volunteer Program. |
| B．Marine Preservation Volunteer Program. |
| C．Victoria Falls Wildlife Volunteering. |
| D．Amazon Jungle Preservation Volunteer Program. |
9 . The Yellow River is the cradle of China’s civilization. And flood control and prevention have always been key to the well-being of the people living along it. Now, scientists can better work on these issues by giving the river a digital twin.
The digital twin of the Yellow River uses various technologies, including big data, artificial intelligence, and the internet of things. Devices (设备) set up along the river collect and transmit information to the center. Based on the information, a 3D model of the river is presented on the computer screen. It’s like the Yellow River has a twin that reflects its real conditions.
One big breakthrough in the river’s digital governance (治理) is “smart stones”. According to Wang Qin, a lead researcher at the Information Center of Yellow River Henan Bureau, a smart stone is a water-proof stone-shaped device with chips, a battery, and a signal transmitter. They are buried in important dike (堤坝) locations to record and report the movement of dike stones. “Upon feeling movement of the dike stones, the smart stone sends an alarm to the center for quick response,” Wang said.
“In the past, researchers had to learn the conditions of the dike on the spot by themselves, putting their lives at risk,” said Zhao Xiao from the bureau. “Now the smart stones can do this for us, more safely, quickly, and accurately.”
And in the sky, drones (无人机) are flying. On the routes designed by engineers, the drones become expert patrollers (巡逻员) of the river, looking at its dikes and flood prevention projects. According to Shen Lin from the Yellow River Conservancy Commission, thanks to the drones, researchers at the command center can get first-hand photos and information. “Researchers then update the 3D model according to the changes the drones reported. The newly updated model helps us test our floodwater release plans in case we ever need to batten down the hatches (未雨绸缪), ”said Shen.
Under the water and up in the sky, intelligence systems are helping to protect the Yellow River Basin on all fronts. According to the Ministry of Water Resources, in the future, we can expect to see the construction of an even more comprehensive digital system for this important river.
1. What is the main purpose of creating a digital twin of the Yellow River?| A．To conduct historical research. |
| B．To create a virtual tourist attraction. |
| C．To raise public awareness of river protection. |
| D．To improve flood control and prevention efforts. |
| A．They record water quality. |
| B．They improve the river’s beauty. |
| C．They monitor and report dike movements. |
| D．They serve as markers for important locations. |
| A．Entertaining tourists. | B．Collecting information on dike conditions. |
| C．Patrolling and take wildlife photos. | D．Testing water quality. |
| A．Complete. | B．Basic. | C．Beautiful. | D．Natural. |
10 . When Alex Lin was 11 years old, he read an alarming article in the newspaper about e-waste. The article said that people were throwing away their e-waste in places it should never go. This was dangerous, the article said, because e-waste contains poisonous chemicals and metals like lead. These harmful substances (物质) can leak into the environment, getting into crops, animals, water supplies — and people.
Alex showed the article to a few of his classmates. They were worried too. But what could they do about this problem with e-waste? How would they even start? “The first thing we did,” Alex says, “was to learn more about the problem.” Alex and his friends spent several weeks gathering information about the chemicals in e-waste and their effects on humans. They learned how to dispose (处理) of e-waste properly and how it could be recycled. “Then,” he says, “we had to find out what the situation was in our town. So we sent out a survey.”
What they found shocked them: Of the people who answered the survey, only one in eight even knew what e-waste was, let alone how to properly dispose of it. Alex and his friends went into action. They advertised in the local newspaper and distributed notices to students, asking residents to bring their unwanted electronics to the school parking lot. The drive lasted two days, and they collected over 21,000 pounds of e-waste.
The next step was to set up an e-waste drop-off center for the town and to find a responsible company to recycle the waste. That was when Alex and his friends learned another scary fact about e-waste — some irresponsible recycling companies don’t break down the e-waste and dispose of it safely themselves. Instead, they ship it overseas to countries such as China and Nigeria, where local environmental laws are not applied. “We checked carefully online to make sure the company we chose didn’t do this,” Alex says.
Because of the work of people like Alex and his team, more and more people are getting the message about safe disposal of e-waste. As Alex says, “Today’s technology should not become tomorrow’s poisonous trash.”
1. What can we learn about Alex from paragraph 1 and paragraph 2?| A．He was curious about chemistry experiments. |
| B．He possessed a strong sense of responsibility. |
| C．He set out to solve the problem individually. |
| D．He formed the habit of reading newspapers. |
| A．Campaign. | B．Imagination. | C．Performance. | D．Technology. |
| A．Lack of available space was the reason for shipping. |
| B．Recycling was totally banned in their own country. |
| C．They were running their companies on a tight budget. |
| D．They were not charged with insecurely disposing it. |
| A．Reusing School Computers | B．Recycling Electronic Waste |
| C．Meeting a challenge | D．Doing Scientific Experiment |
