1 . A shopkeeper’s son breaks a window, causing a crowd to gather. They tell the shopkeeper not to be angry: actually, the broken window is a reason to celebrate, since it will create work for the glazier (装玻璃的工人). In the story, written by a 19th-century economist, the crowd envisions the work involved in repairing the window, but not that involved in everything else on which the shopkeeper could have spent his money — unseen possibilities that would have brought him greater happiness.
If that window were to be broken these days, people might have a different reaction, especially if they were NIMBYs (Not In My Back Yard) who oppose any local construction that affects their quality of life. Their concern might be with the “embodied carbon”. The production of a piece of glass would carry a sizeable carbon cost. Similarly, the bricks and concrete in a building are relics of past emissions. They are, the logic goes, embodied carbon.
Conserving what already exists, rather than adding to the building stock, will avoid increasing these embodied emissions — or so NIMBYs often suggest. At its worst, this idea is based on a warped logic. Greenhouse gases released by the construction of an existing building will heat the planet whether the building is repaired or knocked down. The emissions have been taken out of the world’s “carbon budget”, so treating them as anew debit means double counting. The right question to ask is whether it is worth using the remaining carbon budget to repair a building or it is better to knock it down.
Choosing between these possibilities requires thinking about the unseen. It used to be said that construction emitted two types of emissions. Besides the embodied sort, there were operational ones from cooling, heating and providing electricity to residents. Around the world, buildings account for 39% of annual emissions, according to the World Green Building Council, of which 28% come from operational carbon.
These two types of emissions might be enough for the architects designing an individual building. But when it comes to broader questions, economists ought also to consider how the placement of buildings affects the manner in which people work, shop and travel. Density (密度) lowers the per-person cost of public transport, and this reduces car use. Research by Green Alliance, a pressure group, suggests that in Britain a policy of “demolish (拆除) and densify” — replacing semi-detached housing near public transport with blocks of flats — would save substantial emissions. Without such demolition, potential residents would typically have to move to the suburbs instead, saving money on rent but consuming more energy.
Targeted subsidies (补贴), especially for research and development into construction materials, could speed up the pace at which the built environment decarbonises. What will never work, however, is allowing the loudest voices to decide how to use land and ignoring the carbon emissions of their would-be neighbours once they are out of sight.
1. The first two paragraphs are written to ________.| A．exemplify an outlook on energy conservation |
| B．present a new way of relieving energy crisis |
| C．explain people’s reaction to a broken window |
| D．introduce an argument on carbon emission |
| A．Unsound. | B．Complicated. | C．Distinctive. | D．Underlying. |
| A．Operational carbon accounts for a larger share of carbon emission. |
| B．Repairing old buildings outweighs demolition in energy conservation. |
| C．Higher residential density near public transport may help reduce emission. |
| D．Stopping residents from living in new buildings is sensible to energy saving. |
| A．Interests of NIMBYs are worthy of consideration. |
| B．A comprehensive insight into emission is essential. |
| C．Upgrading construction materials should be prioritized. |
| D．Every resident should do their bit in reducing carbon emission. |
2 . Around the world, coral reefs (珊瑚礁) are in danger. Now, let’s check out a few ways conservationists are protecting these habitats.
Seaweed Smackdown
Hot ocean temperatures can supercharge seaweed growth — and that’s not good for a reef. So, in Hawaii, scientists have used an underwater vacuum (真空吸器) to suck up lots of seaweed into the device’s long tube. In Australia, scientists are studying a low-tech solution: pulling seaweed by hand.
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Some polyps (珊瑚虫) are harmed by heat waves and pollution. Scientists cut parts of coral from a healthy reef. Then these polyps are taken to a nursery, which could be in shallow protected areas underwater. After about a year, the healthy coral parts are attached to damaged reefs. The nursery-grown corals can bring new life to a struggling habitat.
Sound Saver
Healthy reefs are noisy. Fish make different sounds, and thousands of shrimp create and pop bubbles with their claws to create a sound. The biologists play sounds of healthy reefs through underwater speakers. They found that six weeks of broadcasting healthy reef sounds doubled the amount of fish in the area.
Bleaching Killer
One of the biggest threats to coral reefs is bleaching. Here’s how it works.
| Thriving coral Most coral species survive by partnering with tiny algae (藻类), which make food for the coral by changing sunlight into sugar. |
| Under stress But when the ocean water gets too hot, the algae produce too much oxygen, which can hurt the coral. |
| Bleaching So corals kick out the algae. As the algae leave, the color disappears and the coral appears to turn white. This process is called bleaching. |
Biologists have discovered that many corals in the Red Sea have a species of algae in their tissue that’s found nowhere else, so they can survive heat waves. Biologists hope their work will inspire governments and environmental groups to protect these corals.
1. Which of the following might be the subtitle of Paragraph 3?| A．Underwater Nurseries. | B．Fishing Guides. |
| C．Seaweed Cleaners. | D．Colour Designers. |
| A．Breathing in more oxygen. | B．Changing the appearance. |
| C．Absorbing more sound. | D．Partnering with algae. |
| A．To present the serious damages to corals. | B．To explain the reasons for coral habitat loss. |
| C．To introduce the methods of coral protection. | D．To compare the effects of different solutions. |
In an age of rapidly growing urbanization, rooftop farming has emerged as a sustainable response
Rooftop farming, also
As urban populations continue to grow, rooftop farming fosters community engagement
4 . Scientists have found a new way to break down a group of harmful chemicals very hard to get rid of. The discovery could help solve a dangerous and growing problem — how to clean up the pollution of “forever chemicals”.
The group of chemicals known as PFAS (全氟烷基物) are pretty amazing. They’re non-stick, waterproof, and oil proof. They don’t burn easily or dissolve (溶解) in water. So scientists got really excited when they were discovered. Businesses started putting PFAS in all sorts of products, from non-stick pans to waterproof clothes, and from fire-fighting spray to carpets that resist stains. Even things like food wrappers and floss for cleaning your teeth contain PFAS chemicals.
But after a while, scientists realized the same things that made the chemicals useful also caused a real problem — PFAS doesn’t break down in nature. It doesn’t dissolve in water or bum. Not even bacteria can break PFAS down. No wonder these chemicals are known as “forever chemicals”.
As a result, PFAS chemicals surge in the environment. The chemicals are found in air, water, and dirt around the world — and in animals and people. In the US, 97% of humans have PFAS in their blood.
Luckily, scientists in the US have now found a way to break down some PFAS chemicals. Their solution requires boiling PFAS with two other very common chemicals. These chemicals can be found in just about any laboratory.
Dr. Brittany Trang, one of the scientists involved, said she didn’t even want to test the idea at first. “I thought it was too simple,” she said. But the process worked.
The research involved 10 types of PFAS, including two of the most common kinds. That’s a big step. But there are over 12,000 different kinds of PFAS. It’s important to note that the new method can only break down PFAS chemicals that have already been collected. Figuring out how to remove PFAS chemicals from the environment and collect them remains a huge challenge.
1. What can we infer about PFAS chemicals from paragraph 2?| A．Scientists were so excited to invent them. |
| B．They were environmentally friendly at first. |
| C．They are really widely used in our daily life. |
| D．They have more advantages than disadvantages. |
| A．Increase fast. | B．Float everywhere. | C．Extend fully. | D．React quickly. |
| A．It’s already too late to get rid of them. |
| B．There’s still a long way to go about it. |
| C．The new method is too simple to work well. |
| D．It’s impossible to get them removed from the environment. |
| A．Say Goodbye to Forever Chemicals |
| B．PFAS Chemicals Are a Two-edged Sword |
| C．PFAS Chemicals Will Remain a Challenge for Long |
| D．Scientists Find a Way to Break down Forever Chemicals |
5 . Growing up in Kenya, Lesein Mutunkei, together with his family, always celebrated significant occasions by planting trees, which motivated him to protect the environment. It’s what the now 18-year-old soccer player treasures, especially since Kenya has an ongoing problem with deforestation.
Mutunkei follows in the footsteps of the late Kenyan Nobel Peace Prize winner Wangari Maathai who founded the Green Belt Movement in 1977. This initiative has resulted in the planting of over 51 million trees to date.
In 2018, Lesein decided to start a movement of his own. He started by planting one tree for every goal he scored during a football match. He called it Trees4Goals, and it has grown so much that he now plants 11 trees, one for each member of his team, every time he scores. Through this, he wants to inspire young people, specifically his fellow athletes, to follow in his footsteps, take nature conservation seriously, and promise to plant trees every time they score. As a result, some of them have adapted this practice for their sports. “Seeing that they’re taking that responsibility because of the project I started, for me, that is the biggest achievement,” he said.
The initiative has caught the attention of English football club Arsenal and Kenya’s Ministry of Environment and Forestry, which he now works with regularly and gets advice from.
Like Green Belt Movement, Trees4Goals, which has planted 5,500 trees so far, has made it. While Lesein has received some recognition for his initiative, he sets his sights on making it a worldwide phenomenon. “Football is a universal game, and climate change is a universal problem,” he explains. “It has the power to unite, educate and inspire my generation to create a safer and greener future.” This is why he wants to work with the world’s biggest football federation FIFA.
As for what others can do to fight deforestation or other environmental concerns, the teenager says it’s important to just get involved in some way, no matter how small.
1. What made Lesein get interested in environmental protection?| A．The influence of his family. |
| B．Wangari Maathai’s huge assistances. |
| C．The demand of the football team. |
| D．His fellow athletes’ encouragement. |
| A．To gain Kenya’s support. |
| B．To set an example for others. |
| C．To catch Arsenal’s attention. |
| D．To show his achievements. |
| A．Promoting football’s development. |
| B．Going global with the help of FIFA. |
| C．Beating climate change completely. |
| D．Getting beyond Green Belt Movement. |
| A．Fame is a great thirst of the young. |
| B．A youth is to be regarded with respect. |
| C．Positive thinking and action result in success. |
| D．Success means getting personal desires satisfied. |
Imagine you are out fishing on the high seas - the wind and water are clean and comfortable and you begin bringing up your first catch of the day. That's when everything goes wrong. Your fishing nets are tangled up (缠成一团) in older, abandoned fishing tool, and you're unable to untangle them. Your equipment
Ghost fishing is what abandoned fishing tool does. It still catches fish, but no one benefits. Trapped fish die and attract scavengers (清道夫)
Environmental agencies estimate that 10 percent of all seawater litter is lost or deserted fishing tool
It's not the intention of the majority of fishermen to lose their tool. In most circumstances bad weather is to blame. But in other cases fishermen throw their tool in the ocean on purpose, risking expensive fines. But to them, it's worth the risk
By marking tool with electronic tags and utilizing GPS technology, owners are more likely to recover lost tool and less likely to abandon it. Currently, ownership regulations are reportedly very weak. Leading the effort for tagging fishing tool and creating accountability is the GGTI (Global Ghost Tool Initiative).
Ghost fishing poses a serious threat to the fishing industry worldwide, and a global effort is needed to solve it.
Microplastics: Out of Sight, Out of Mind?
People joke that someone suffering from paranoia (妄想症) sees danger everywhere, thinking someone is out to get him. In the case of microplastics, you don’t need to have paranoia to be worried about them being everywhere, because they basically are!
What exactly are microplastics? They are particles (颗粒) of any type of plastic that are less than 5 millimeters in diameter (直径). They have resulted from the plastic pollution widespread in the world today.
When plastic is exposed to environmental forces, it breaks down into these tiny particles, which, in turn, do not disappear but continue to exist for hundreds or even thousands of years. Every piece of plastic that has ever been made is still on Earth today, except for what has been burned. Often mistaken for food, plastics and microplastics in oceans and on beaches are often consumed by marine animals, which is harmful. Research has linked microplastics to cancer and other problems in animals.
Whatever you think about these particles, taking them in is easier than you think. When you heat food in a plastic dish in the microwave, microplastics get into your food. The water from a plastic water bottle contains the particles as well. After taking surveys of microplastics in air, water and seafood, scientists estimate that people may easily be eating 5 grams of plastic a week. Researchers don’t know yet if or how this will affect humans. Microplastics have been found in human tissue samples, and no one yet knows how long they stay in the human body or what problems may arise.
Not until the amount of plastic waste in the world is reduced will microplastics decrease. So, while the evidence is still missing of the effect microplastics have on people’s health, reusing and recycling plastic is a no-brainer.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________| A．5%. | B．80%. | C．40%. | D．10%. |
| A．Polluting the environment. |
| B．Destroying wildlife habitats. |
| C．Endangering new species. |
| D．Hunting to a great extent. |
| A．To appeal to people to protect wildlife. |
| B．To emphasize the importance of the Earth. |
| C．To describe different ways to stop pollution. |
| D．To analyze the reasons for wildlife’s disappearing. |
9 . Antarctic Tourism: Should We Just Say No?
More people are visiting Antarctic, the frozen continent than ever before.
The distance most visitors travel to reach Antarctica makes carbon emissions a serious problem.
There is clear agreement that something needs to change, but no agreement on what those changes should be.
| A．The number of visitors hit 100,000 for the first time this tourist season, a 40% jump over the previous record. |
| B．The Antarctic is at risk not just because of the breakability of its environment, but due to the lack of a single governing body. |
| C．Should landings be made at a larger number of sites for instance, or should we aim to keep the human footprint as small as possible? |
| D．If what you really want is to connect with snow and ice and you’re in the northern half, can you catch a train to the nearest snow region instead? |
| E．The average per-person carbon emissions for an Antarctic tourist are 3.76 tonnes – about the total sum that an individual typically generates in an entire year. |
| F．There is so little regulation now that almost anything that will protect the areas by an official legal source rather than self-regulated would be really positive. |
From a distance, the grey cement bridge looks unremarkable. Two tunnels on either side of the Trans-Canada Highway are in semi-circles that end bluntly on the pavement below. But on top, away from passing motorists’ eyes, lies a grassy oasis. Against the odds, pine trees and wildflowers have taken root here, giving the overpass a fringe of greenery. On the edges, wire fencing provides safe passage for wandering animals.
Tony Clevenger has dedicated much of his life to studying the performance of Banff’s wildlife crossing structures. When the first wildlife bridges went up, Clevenger, a researcher with the Western Transportation Institute, was living in Canmore, and recalls the distinctly negative atmosphere that surrounded what many saw as a hair-brained scheme by Parks Canada. Save for a few small crossings in the eastern United States, no one had ever attempted something like this before — and no one believed it would work. Editorials in the local paper scoffed at the “waste of taxpayers’ money” and confidently stated animals would never use the $2 million to $3 million man-made bridges. Others believed wolves would herd their prey into the fence, violently killing them before shocked tourists.
“This project started in a bad spot. There was a lot of opposition and criticism,” Clevenger says. “It took several years of good data, publishing in scientific peer-reviewed journals, to change people’s minds.”
Clevenger now has 17 years-worth of data proving the efficacy of the crossings. Among large carnivores, mortality (死亡) rates are 50 to 100 per cent lower along sections of the highway where overpasses and underpasses exist. In those same sections, mortality rates for elk are almost zero, compared to 100 elk-vehicle collisions per year in the mid-1990s. Clevenger’s research has shown that 11 species of large mammals in Banff have used the structures more than 200,000 times, including unexpected species such as red fox, hoary marmot, boreal toads, wolverines, lynx, garter snakes and beavers.
In 2014, a Montana State University study found that not only are grizzly bears using the crossing structures, but the structures are also helping to maintain genetically healthy populations among the bears that use them. Grizzlies were crossing with enough frequency to ensure populations on either side of the highway weren’t genetically isolated from each other.
“This is Canada’s biggest conservation success story — it’s the largest highway mitigation complex in the world,” says Clevenger. “You won’t find anything anywhere else in the world close to what we have. We have the most overpasses in one localized area and almost half of all the overpasses in North America.”
1. Why did Tony Clevenger face opposition and criticism at the beginning of the wildlife crossing project?| A．Because of disbelief regarding the project’s feasibility and effectiveness. |
| B．Due to the design flaws of the crossing structures. |
| C．Because of concerns about the environmental impact of the structures. |
| D．Due to insufficient funding for the project. |
| A．Grizzly bears and elk. | B．Wolves and red foxes. |
| C．Garter snakes and beavers. | D．Hoary marmots and wolverines. |
| A．It confirmed the disbelief surrounding the effectiveness of the crossings. |
| B．It identified design flaws in the crossing structures. |
| C．It criticized the Canadian government’s conservation efforts. |
| D．It provided evidence of grizzly bears using the crossings and maintaining genetically healthy populations. |
