1 . A huge section of the Milne Ice Shelf, located on Ellesmere Island in the northern Canada, collapsed into the Arctic Ocean, according to the Canadian Ice Service. This created an “ice island” which is about 30 square miles in size. As a comparison, Manhattan Island is about 23 square miles.
“Entire cities are that size. These are big pieces of ice,” Luke Copland, a glaciologist at the University of Ottawa who was part of the research team studying the ice shelf, told Reuters. “This was the largest remaining intact (完整的) ice shelf, and it’s collapsed, basically. ”
The Canadian Ice Service said on Twitter that “above-normal air temperatures, offshore winds and open water in front of the ice shelf are all part of the recipe for the ice shelf to break up.” A huge section of the Milne Ice Shelf has collapsed into the Arctic Ocean, producing a 30-square-mile ice island.
The ice shelf has now been reduced in area by about 43%. An ice shelf is a thick slab of ice, attached to a coastline and extending out over the ocean, according to the National Snow and Ice Data Center. “Some shelves have existed for thousands of years,” the center said.
So what’s going on up there? Though the planet is warming worldwide due to climate change, the Arctic has been warming at a rate twice that of the rest of the world. This summer has been particularly warm: Arctic sea ice melted to its lowest July level on record and in June, a town in Siberia soared (急升) to 100.4 degrees Fahrenheit, believed to be a record high for the Arctic.
“When I first visited those ice caps, they seemed like such a permanent fixture of the landscape,” Mark Serreze, director of the NSIDC and geographer at the University of Colorado, Boulder, said in a statement. “To watch them die in less than 40 years just blows me away.”
1. Why does the author mention Manhattan Island in Paragraph 1?| A．To stress that Manhattan Island is vital for Canada. |
| B．To introduce where Manhattan Island locates. |
| C．To say the great collapse is terrible. |
| D．To compare two different places. |
| A．Its location. |
| B．Its huge body. |
| C．Special intact form. |
| D．Higher air temperatures. |
| A．Arctic sea ice melted to its lowest in June. |
| B．Climate change brings about great changes. |
| C．The earth is warming because of the loss of ice shelf. |
| D．The Arctic warms more slowly than the rest of the world. |
| A．Shocked. | B．Humorous. |
| C．Scientific. | D．Neutral. |
2 . Malin Pinsky had the first of two lightbulb moments in 2003 while crossing Drake Passage. He was then standing on the bridge of a research ship and was scanning the sky for seabirds, which was one of his duties as a research technician on the cruise (海上航游). Just five months earlier he had finished college, where he studied biology and environmental science.
As the ship entered nutrient-rich Antarctic waters, whales suddenly showed up all around the ship. That moment on the bridge helped him realize that the ocean looks featureless from the top, but there’s so much going on underneath.
The second lightbulb moment hit him several months later. Pinsky was then an intern (实习生) in Washington, D.C. His job was making photocopies. It was around the time when two big reports had come out. Both focused on what policies might best preserve U.S. ocean resources. “I realized we have all these laws and policies that determine how we as a society interact with the ocean. But they’re far out of date. We don’t yet have the science to know what the new policy should be,” Pinsky said.
Today he runs a lab with about 20 workers. His team wants to seek how our changing climate, as well as overfishing and habitat destruction, might be driving changes in fish and other animals in the sea. To find out, team members travel each year to coral reefs near the Philippines. There, they carefully catalog populations of different fish. They collect data on the growth and mating of these fish, their diversity and other factors.
“Pinsky’s broad approach to the problem — looking at species, where they live and how fisheries are managed — is setting the pace for other scientists,” says Kimberly Oremus, a fishery economist at the University of Delaware in Newark. “Pinsky is pushing the whole field to respond to his growing body of research.”
1. What made Pinsky have the first lightbulb moment?| A．The vastness of the ocean. |
| B．The sight of seabirds in the sky. |
| C．The view of Drake Passage. |
| D．The appearance of whales around the ship. |
| A．He needed to take more photos of oceans. |
| B．He should do something to update ocean policies. |
| C．The U.S. ocean resources need to be better preserved. |
| D．There have already been perfect policies to preserve the ocean. |
| A．The harm of overfishing. |
| B．Features of different fish. |
| C．Factors affecting ocean ecosystems. |
| D．The reasons for global warming. |
| A．Positive. | B．Doubtful. | C．Disapproving. | D．Uninterested. |
3 . As awareness of climate change grows, so does the desire to do something about it. But the scale of the problems it causes—from wildfires to melting glaciers to droughts—can seem utterly overwhelming. It can be hard to make a connection between our everyday lives and the survival of polar bears, let alone how we as individuals can help turn the situation around.
One way to gain a quantifiable understanding of the impacts of our actions, for good and bad, is through what is known as a carbon footprint. But while the concept is gaining traction, it is not always fully understood. According to Mike Berners-Lee, a professor at Lancaster University in the UK and author of The Carbon Footprint of Everything, it is “the sum total of all the greenhouse gas emissions that had to take place in order for a product to be produced or for an activity to take place.”
What steps a person can take to reduce their personal footprint the most of course depends on the kind of lifestyle they presently live, and the same actions are not equally effective for everyone. Berners-Lee notes that, “for some people, flying may be 10 percent of their footprint, for some people it’s zero, and for some it’s such a huge number that it should be the only thing they should be thinking about.”
It isn’t easy to calculate a carbon footprint and it has been claimed that the earliest such calculator appeared in 2004 as part of the “Beyond Petroleum” campaign of oil giant BP—a fact that causes some observers to criticize the pressure to reduce personal carbon footprints as a “sham” to “promote the slant that climate change is not the fault of an oil giant, but that of individuals.”
“I would say personal carbon footprint calculators are a useful tool to assess the impact of your immediate actions.” Berners-Lee says. “But what’s much more important than your personal carbon footprint is your climate shadow, which aims to paint a picture of the full sum of one’s choices and the impact they have on the planet. For example, how you vote, where you work, how you invest your money, and how much you talk about climate change.
1. What does the underlined word “traction” in paragraph 2 probably mean?| A．attention | B．insight | C．control | D．power |
| A．By presenting a fact | B．By making a comparison |
| C．By clarifying a concept | D．By giving suggestions |
| A．unclear | B．favorable | C．indifferent | D．disapproving |
| A．Tools are more important than choices. | B．Only individuals are responsible for climate change. |
| C．Climate shadow covers a broad range of actions. | D．Calculating carbon footprint is the most effective. |
4 . Researchers in Australia have identified enzymes (酶) in the body of certain beetle larvae (甲虫幼虫) that can degrade or break down plastic. In a study published in Microbial Genomics, they write that these “superworms” could help reduce plastic waste in the future.
“Superworms are like mini recycling plants, cutting up the polysyrene (聚苯乙烯) with their mouths and then feeding it to the bacteria in their stomach,” said Chris Rinke from the University of Queensland in Australia. “The breakdown products from this reaction can then be used by other microbes to create high-value chemicals.”
In the study, scientists divided beetle larvae into three groups, feeding one group wheat bran, one polystyrene and one nothing. Over three weeks, they monitored their growth. “We found that superworms fed a diet of just polystyrene not only survived, but even had marginal weight gains,” said Rinke. “This suggests the worms can get energy from the polystyrene, most likely with the help of their stomach bacteria.”
On the other hand, the plastic-fed worms gained much less weight and were overall much less healthy than the bran-fed ones, though better off than the starvation group. After three weeks, some larvae were also set aside to grow into beetles, according to the study. About 93% of the bran-fed larvae formed adult worms, while about 67% of the plastic-fed larvae and 10% of the starved larvae formed adult worms.
The researchers investigated the superworm’s stomach bacteria to find the specific enzymes linked to plastic degradation, writes Fionna M. D. Samuels for Scientific American. The enzyme that degrades the polystyrene appears to live with the stomach bacteria, not the worm itself.
Polystyrene is one of the most common plastics used today. But it’s not very chemically reactive, and breaking it down with industrial recycling methods takes high heat. So, researchers have been looking for plastic-degrading enzymes and bacteria for years.
Further research will still need to be done to figure out how to employ these worms, bacteria and enzymes in recycling facilities.
1. What does Chris Rinke compare superworms to?| A．Small plants. | B．Beetle larvae. | C．Stomach bacteria. | D．High-value chemicals. |
| A．Few. | B．Tiny. | C．Obvious. | D．Normal. |
| A．The damage of plastic to life. |
| B．Possible causes of plastic pollution. |
| C．Researchers’ efforts over the years to recycle plastic. |
| D．The necessity of finding out a way to degrade plastic. |
| A．To report a new way to recycle plastic. | B．To call on people to reduce plastic waste. |
| C．To explain how larvae can degrade plastic. | D．To introduce the findings of a new research. |
5 . For years, scientists have debated whether humans or the climate have caused the population of large mammals to decline dramatically over the past several thousand years. A new study from Aarhus University confirms that climate cannot be the explanation.
About 100,000 years ago, the first modern humans migrated out of Africa in large numbers. They were very good at adapting to new habitats, and they settled in almost every kind of landscape — from deserts to jungles to the icy taiga in the far north.
Part of the success was human’s ability to hunt large animals. With clever hunting techniques and specially built weapons, they perfected the art of killing even the most dangerous mammals.
But unfortunately, the great success of our ancestors came at the expense of the other large mammals.
It is well-known that numerous large species went extinct during the time of worldwide colonization by modern humans. Now, new research from Aarhus University reveals that those large mammals that survived also experienced a dramatic decline.
By studying the DNA of 139 living species of large mammals, scientists have been able to show that the abundances of almost all species fell dramatically about 50,000 years ago. This is according to Jens-Christian Svenning, a professor and head of the Danish National Research Foundation’s Center for Ecological Dynamics in a Novel Biosphere (ECONOVO) at Aarhus University and the initiator of the study.
“We’ve studied the evolution of large mammalian populations over the past 750,000 years. For the first 700,000 years, the populations were fairly stable. But 50,000 years ago, the populations fell dramatically and never recovered,” he says, and continues: “For the past 800,000 years, the globe has fluctuated (波动) between ice ages and interglacial periods about every 100,000 years. If the climate was the cause, we should see greater fluctuations when the climate changed 50,000 years earlier.But we don’t. Humans are, therefore, the most likely explanation.”
1. What do the underlined words “the success” mean in Paragraph 3?| A．The evolution of large mammals. |
| B．The prosperity of various habitats. |
| C．The achievement of human migration. |
| D．The progress in hunting techniques. |
| A．Populations of large mammals significantly dropped. |
| B．Living conditions of large mammals remained stable. |
| C．Global climate dramatically changed. |
| D．A large number of glaciers suddenly melt. |
| A．Species. | B．Place. | C．Time. | D．Climate. |
| A．Climate Impact on Animals |
| B．Changes of Prehistoric Environment |
| C．Evolution of Large Mammal Populations |
| D．Human Influence on Giant Mammals |
6 . For some climate challenges, there are relatively straightforward fixes. For example, renewable energy sources can already replace much of the energy needed to power buildings, cars and more.
There’s no substitute for food, but shifting what we eat is possible. If everyone on the planet ate vegetables, greenhouse gas emissions from the food system could be cut by more than half; a planet of vegetarians would reduce food emissions by two thirds. If we stopped consuming conventional food and relied on a lab-grown nutritional food instead of soil or water-produced food, we could prevent about 1 degree centigrade of future warming, according to a recent paper that considered the unique thought experiment.
“What this work says is: Hey, look, we can still get pretty big wins even if we’re not making these really big changes in dietary composition,” says Clark. “I think that’s really powerful, because a lot of people just don’t want to make those really big dietary changes, for many reasons. While vegetarian diets are becoming more common in America and some European countries, it’s absolutely ridiculous to assume that everyone will be eating a vegetarian diet 30 years from now,” he says.
Food choices are personal, deeply connected to cultural, religious, emotional, economic concerns and so much more. “Rather than dictate how to do it, it’s much better to try to give choices,” says Naglaa, a food, nutrition and environment researcher at Tufts University. This approach aims to inform people so that they can make choices that correspond with their needs and values instead of waiting for the authority’s rules and orders. As a whole, those choices can benefit both human health and the planet. For that to happen, it is necessary to work alongside large-scale efforts to reshape industrial food production.
“But what people choose to eat daily is far from insignificant,” says Clark. “We don’t all have to become vegetarians overnight. Small changes can make a big difference.”
1. How does the author show the effects of dietary changes in paragraph 2?| A．By analyzing the reasons. | B．By using a quotation. |
| C．By answering questions. | D．By listing data. |
| A．Indifferent. | B．Skeptical. | C．Favorable. | D．Negative. |
| A．Command. | B．Persuade. | C．Perceive. | D．Describe. |
| A．How small changes to our diets can benefit the planet |
| B．Small changes in life choices can make a big difference |
| C．Why renewable energy sources can reduce gas emissions |
| D．Lab-grown nutritional food could prevent future warming |
7 . Eradajere Oleita thinks she may have a solution to two of our country’s long-lasting problems: garbage and poverty. It’s called the Chip Bag Project. The 26-year-old student and environmentalist from Detroit is asking a favor of local snack lovers: Rather than throw your empty chip bags into the trash, donate them so she can turn them into sleeping bags for the homeless.
Chip eaters drop off their empty bags from Doritos, Lay’s, and other favorites at two locations in Detroit: a print shop and a clothing store, where Oleita and her volunteer helpers collect them. After they sanitize the chip bags in soapy hot water, they slice them open, lay them flat, and iron them together. They use padding and liners from old coats to line the insides.
It takes about four hours to sew a sleeping bag, and each takes around 150 to 300 chip bags, depending on whether they’ re single-serve or family size. The result is a sleeping bag that is “waterproof, lightweight, and easy to carry around,” Oleita told the Detroit News.
Since its start in 2020, the Chip Bag Project has collected more than 800,000 chip bags and, as of last December, created 110 sleeping bags.
Sure, it would be simpler to raise the money to buy new sleeping bags. But that’s only half the goal for Oleita-whose family moved to the United States from Nigeria a decade ago with the hope of attaining a better life-and her fellow volunteers. “We are dedicated to making an impact not only socially, but environmentally,” she says.
1. What does the underlined word “sanitize” mean?| A．Clean. | B．Burn. | C．Color. | D．Dry. |
| A．It helps to shake off poverty. |
| B．It has gathered over 900,000 bags. |
| C．It was put forward by chip lovers. |
| D．It helps the poor and environment. |
| A．Because they are forbidden to litter them. |
| B．Because they happen to print things there. |
| C．Because they want to help Eradajere Oleita. |
| D．Because they can use them to trade clothes. |
| A．Chipping Away at Poverty | B．Chip Eaters Do a Big Favor |
| C．A Story about Eradajere Oleita | D．Good Ways to Save Environment |
8 . Five months ago, a new species of box jellyfish was discovered in Hong Kong. It is a relative of the deadly Australian box jellyfish, one of the most venomous (有毒的) animals on Earth. One sting (刺伤) from it can kill a person in minutes.
A university team in Hong Kong, led by Qiu Jianwen from the Hong Kong Baptist University, discovered it at the Mai Po Nature Reserve, a local wetland area. It was the first discovery of a new box jellyfish species in Chinese waters.
But it’s not the first time biology professor Qiu has discovered a new creature. He’s made more than 30 discoveries in about 20 years spent exploring new marine (海洋的) animals.
Qiu doesn’t go looking for new species on purpose. In 2014, he did research on the health of coral in Hong Kong waters. To learn more, Qiu and his team needed to find all of the coral species involved. And in doing so, they discovered four new coral species.
Finding new species reminds Qiu of how biologically diverse Hong Kong’s waters are. Hong Kong takes up just 0.03 percent of China’s total marine area, yet it is home to more than 25 percent of all marine species recorded in China, a report by the University of Hong Kong showed.
However, Hong Kong’s marine animals face threats, due to factors including habitat loss, climate change and overuse of natural resources.
Although action is being taken, it focuses more on bigger creatures, like dolphins and birds. “Many marine species are small and they are often overlooked. If these species were to become extinct, few people would notice or care. But for me, each one has its rightful place,” said Qiu.
He hopes everyone can recognize the importance of the ocean. “When more people show concern for the ocean, we are, in fact, acting for our own benefit,” he said.
1. Where was the new species of box jellyfish found?| A．In a university lab of HK. | B．In the ocean of Australia. |
| C．In a nature reserve of HK. | D．In a wetland of Australia. |
| A．To find new species of coral for the study. |
| B．To study the health condition of coral. |
| C．To study the living environment of coral. |
| D．To find all coral species in the world. |
| A．All of them are dying out. |
| B．No action is being taken to protect them. |
| C．Habitat loss is the biggest threat to them. |
| D．Some of them were discovered by chance. |
| A．Small marine species aren’t protected as they deserve. |
| B．Bigger creatures like dolphins and birds should be better protected. |
| C．People are now taking action to better protect small marine species. |
| D．More and more people are aware of the extinction of small marine species. |
9 . Beginning construction in 1632, the Taj Mahal is located in this city of Agra. It is considered one of the most beautiful sites in the world. In fact, it was named one of the new seven wonders of the world.
But it could become more difficult to see and to glimpse this glorious site because of pollution. It’s an unhealthy, even hazardous (危险的) problem for parts of India. Delhi, Kolkata, and Mumbai were among the 10 most polluted cities on earth this week, according to a Swiss company called IQAir.
CNN’s Michael Holmes explains what it all means. India’s iconic monument almost lost in the smog in the city of Agra. We are facing difficulty in taking pictures of Taj Mahal due to pollution. The Taj Mahal is not clearly visible. Every year, when the temperatures drop and farmers burn their fields, the air turns toxic (有毒的) in many Indian cities.
Delhi is notoriously (声名狼藉) ranked among the world’s most polluted cities. And the current air quality there has once again reached hazardous conditions, forcing primary schools to temporarily close and many people to work from home or just stay indoors altogether. The problem is so serious. A recent air quality life index report says poor air quality could shorten an average Indian’s life expectancy by more than five years, if World Health Organization guidelines on controlling pollution aren’t met. And it’s even affecting one of the country’s favorite pastimes.
India is currently hosting the Cricket World Cup with Bangladesh set to play Sri Lanka in a match in Delhi. But the air quality is so poor. Some players are wearing masks and both teams have canceled training sessions. The coach of Bangladesh’s team says the conditions have not been ideal.
1. Which is the least polluted city according to the text?| A．Agra. | B．Mumbai. | C．Delhi. | D．Kolkata. |
| A．Forest fires and farmers’ burning. | B．Low temperature and forest fires. |
| C．Global warming and low temperature. | D．Low temperature and farmers’ burning. |
| A．Taj Mahal is one of the most beautiful scenic spots. |
| B．All schools were forced to close in many Indian cities. |
| C．Indians may have a shorter lifespan if no measures are taken. |
| D．In the Cricket World Cup, India is set to play Bangladesh in a match. |
| A．To reveal the real cause for air pollution. |
| B．To express concern for the athletes in the match. |
| C．To prove the Taj Mahal has lost its charm in smog. |
| D．To show the impact of air pollution in India on all sides. |
10 . As the world struggles to deal with climate change, some companies are working to capture(捕捉) polluting carbon dioxide(CO₂) from the air.
The heavy use of fossil fuels(化石燃料) over the last 150 years has released massive amounts of greenhouse gases, like CO₂, which have caused the Earth to warm up.
Scientists say large amounts of CO₂must be removed from the atmosphere and stored. Plants and trees do this naturally. But there’s so much CO₂in the atmosphere that just planting trees and protecting forests won’t solve the problem. And, when 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, a common rock, 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, though expensive, doesn’t produce more CO₂. The new plant can remove 1, 000 tons of CO₂a year. That’s a tiny amount compared to how much carbon needs to be removed from the atmosphere. But the company says it hopes to remove a billion tons per year by 2035. Graphyte, another US company working on DAC, collects unwanted plants and wood products and dries them completely so they can’t break down. Graphyte then smashes them into small bricks and buries them deep underground.
Not everyone is excited about carbon removal. Some experts worry that it will take too long for DAC technology to become powerful enough 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.
1. What does the author try to say in paragraph 3?| A．Protecting forests is necessary. | B．The climate crisis is unavoidable. |
| C．Why DAC has come into being. | D．Why there’s much CO₂in the air. |
| A．It’s hard to find proper limestone. | B．The process produces more CO₂. |
| C．It needs an amount of electricity. | D．It doesn’t capture enough CO₂ now. |
| A．It promotes renewable energy. | B．It has a long way to go. |
| C．It can beat climate change. | D．It is so cost-effective. |
| A．Exploring Methods of Removing CO₂ |
| B．Building Two Plants to Capture CO₂ |
| C．Planting Trees to Fight Climate Crisis |
| D．Replacing Fossil Fuels by Using DAC |
