1 . From airplanes to apartments, most spaces are now designed with sound-absorbing materials that help decrease various sounds of everyday life. But most of the sound-absorbing materials that can cancel out human voices, traffic noise and music are made from plastic foams (泡沫) that aren’t easily recycled or degraded. Now, researchers reporting in ACS Sustainable Chemistry & Engineering have created a biodegradable film (薄膜) obtained from seaweed, which effectively absorbs sounds in this range.
Controlling and optimizing the way sound moves throughout a room is the key to creating functional spaces. Foam sound-absorbing panels are a common solution, and they come in a variety of materials and thicknesses tailored to specific sound requirements. Most of these foams, however, are made from a type of plastic material and other chemical substances that are obtained from natural oil or petrol. To avoid petrochemicals, researchers have explored more renewable sources and biodegradable sound-absorbing alternatives. But many current options are made from plant fibers that don’t effectively decrease noises in the most useful range of sound frequencies, or they are too thick or difficult to produce. So, Chindam’s team wanted to develop a biodegradable material from a plant, which would be simple to produce and could absorb a range of sounds.
The team created films of agar (琼脂), a material that comes from seaweed, along with other additives developed from plants and varied the thickness of the films. After running the materials through a battery of tests, the researchers measured how well the films reduced sound across a range of frequencies. To do this, the team created a sound tube in which a speaker is placed at one end, and the test film is fitted over the other end. Microphones in the middle of the tube measured the amount of sound sent by the speaker and the amount of sound reflected off the film. These experiments showed that the films with many small holes made with the highest concentrations of agar had the greatest sound-absorbing qualities and performed similarly to traditional sound-absorbing foams. The researchers plan to explore ways to change the agar films to give them other desirable properties, such as flame resistance, and will explore other biologically obtained film materials.
1. What is the disadvantage of plastic foams?| A．They take up, too much space. | B．They cannot absorb sounds effectively. |
| C．They cannot meet specific sound requirements. | D．They have difficulty achieving sustainable use. |
| A．One obtained easily and effectively. | B．One produced toughly and tiredly. |
| C．One developed from petrochemicals. | D．One made from plant fibers. |
| A．The purpose of film research. | B．A series of tests on the new material. |
| C．A tool of measuring the film thickness. | D．The difficulty of searching the new material. |
| A．An Eco-friendly Sound-absorbing Material from Seaweed |
| B．Plastic Foams: the Worst Choice of Absorbing Sounds |
| C．A Tube for Measuring the Amount of Underwater Sounds |
| D．Seaweed: a Better Sound-absorbing Underwater Plant |
2 . The carbon footprint shows how much carbon dioxide a person emits(排放)in everyday life. It measures the amount offossil(化石)fuels and electricity someone uses up as well as the carbon footprint of the products they buy. When we use our cars or heat our homes with carbon dioxide，various other gases are set free.
You can measure your carbon footprint by using a calculator that you can find on various websites.
| A．Many people travel between cities and suburbs every day. |
| B．The carbon footprint is usually measured in tons of CO2 per year. |
| C．These emissions lead to a thicker atmosphere and global warming. |
| D．It is also vital to persuade others to take the same steps that you do. |
| E．There are many actions you can take to reduce your carbon footprint. |
| F．The websites also provide carbon storage tools and methods for individuals. |
| G．Buying local food is another way of restricting emission into the atmosphere. |
3 . Cities are diverse ecosystems. In addition to visitors from the wild, a large number of species share our urban areas. As our cities spread, we need to think about what it is like for other species to have human neighbors.
Cities are built for humans.
There are also structures built with the aim of bringing wildlife into the city. The Beijing Olympic Forest Park is a good example. The park used native plants and created open, natural spaces for wildlife. The result is a zone in Beijing with over 160 species of birds. In many ways, the park is the opposite of a zoo.
If we learn to share our space, we can become better neighbors to the wildlife around us.
| A．They would feed water plants. |
| B．Our actions sometimes help other species. |
| C．If we do not, more species will become extinct. |
| D．Now, they have come to value their winged neighbors. |
| E．Therefore, they do not always provide suitable habitats for wildlife. |
| F．Instead of being kept in cages, wildlife can move about freely. |
| G．It’s intended to protect birds and fight pollution at the same time. |
4 . For the past 13 years, Martin Burrows has been working as a long-distance truck driver. Spending up to five nights a week on the road can be a lonely business, leaving him with plenty of time to notice his surroundings. “I kept seeing more rubbish everywhere and it was getting on my nerves. I decided I had to do something about it,” he says. One day, he stopped his vehicle, took out a trash bag and started picking up the garbage. The satisfaction after clearing a small area was remarkable.
Before his time on the road, Burrows spent over two decades in the military as a vehicle driver. His service saw him stationed throughout Europe and also on tours in Afghanistan. After returning to civilian life, he was diagnosed with PTSD (创伤后应激障碍) and had a mental health crisis in 2017. His involvement in fundraising for Help for Heroes led him to meet a man who used model-building as a distraction from PTSD. Burrows realized that his act of roadside cleanup had a similar calming effect on his mental well-being.
By 2019, Burrows had begun using his free time on the road to regularly clean up garbage. A passerby encouraged him to set up a Facebook group, which he called Truckers Cleaning Up Britain. “I was worried I’d be the laughing stock of my town for putting videos and photos up of me cleaning but people started to join,” he says. “I was amazed. The local council stepped in and gave me litter-picking supplies and we’re up to almost 3,000 members now.”
Since truckers are so often on the move, the Facebook page acts as a means of raising awareness rather than a platform for organizing cleanups. Burrows expressed his intention to continue the cleanup efforts as long as his physical condition allowed, as he still found joy in the process.
1. What initially caused Burrows to pick up roadside garbage?| A．He wanted to kill time by picking up litter. |
| B．He aimed to raise fund for soldiers with PTSD. |
| C．He felt annoyed to see the increasing rubbish. |
| D．He received the assignment from his employer. |
| A．It resulted in his embarrassment. | B．It increased his sense of isolation. |
| C．It worsened his stress and anxiety. | D．It brought him comfort and relief. |
| A．He feared being teased for his action. |
| B．He was lacking in advanced cleanup tools. |
| C．He was unsure about the group’s development. |
| D．He worried about the local council’s disapproval. |
| A．A Joyful Volunteer Experience | B．A Trucker’s Cleanup Initiative |
| C．A Fighting Hero against PTSD | D．A Platform for Environmentalists |
5 . Damon Carson calls himself a matchmaker (媒人) of the never-ending waste of American society, trying not to pair people with people, but things with people.
In the late 1990s, Carson was on break from business school in Vail, Colorado, when he discovered the vast world of waste. He began thinking about creating a secondhand store that would sell old materials and keep them out of being wasted. As a result, in 2010, his company, Repurposed Materials appeared.
For nearly ten years, his company, Repurposed Materials, has not been looking to recycle the waste he gets — breaking it down to make something new — but rather finding new homes for thrown-away goods in their original forms.
Carson, a husband and father of three adult children, is far from wasteful. Frugal is how he describes himself. The clothes he’s wearing all came from a charity shop; his truck was bought with 290, 000 kilometers driven.
“Why break something down, why melt something down, if it still has value?” he asks. An old oil-field pipe might be melted down and turned into a car bumper, but it still takes an amount of power to finish the complete change. Why not leave it as a steel pipe? Why not turn it into a fence post on a farm? The only cost is transport.
American industrial facilities create and throw about 7.6 billion tons of unwanted industrial materials every year. For the moment, Carson’s unique business finds new lives for millions of kilograms of industrial waste every year.
1. What is paragraph two mainly about?| A．Carson’s school lessons. |
| B．Carson’s journey to Colorado. |
| C．The start of Carson’s business. |
| D．The serious waste of materials. |
| A．Marketing wastes to people in need. |
| B．Breaking down the wasted goods. |
| C．Manufacturing industrial products. |
| D．Recycling the thrown-away stuffs. |
| A．Economical. | B．Poetic. | C．Tough. | D．Risky. |
| A．Well began, half done. |
| B．Innovative thinking counts. |
| C．One is never too old to learn. |
| D．Hard work will pay back. |
6 . Do you know that forests cover an estimated 38 percent of the total land surface of the European Union (EU)? And that these extensive areas covered with trees and underbrush need to be protected so they can continue to do good for the environment for the next generation? Now the EU has just come up with is ambitious new “Forest Strategy”.
Forests can fight against climate change and prevent biodiversity loss They can reduce the impacts of climate change by cooling down cities, protecting us from heavy flooding, and reducing drought impacts. They are valuable ecosystems that are home to a major part of the world’s plants and animals. But forests also improve our health and well-being through functions like water regulation, erosion (侵蚀) control and air purification. And they serve as ideal settings for “recreation, relaxation and learning, as well as securing livelihoods”.
This new European- wide forest conservation vision takes in an impressive commitment to plant a minimum of three billion additional trees over the next decade. This is an ambitious plan but a long overdue one because forests have been battered by severe weather and human impacts, particularly the demand for wood over the last ten years. As the EU Observer puts it,“extreme weather events and the increasing demand for forest services and products, driven by wood-based bioenergy and international trade, have accelerated tree cover loss in the last decade.”
This EU strategy takes into account the complexity of ; forest sustainability. Observation, knowledge exchange, ongoing monitoring and close cooperation between public and private organizations and individuals are also key elements in this new continent- wide forest protection strategy.
This is a future- focused blueprint, designed to protect these precious green areas, and ensure that the trees and greenery are here to stay!
1. Why are two questions raised in the beginning?| A．To tell us the EU’s forest coverage. |
| B．To call on people to protect forests. |
| C．To explain the reason for the strategy. |
| D．To encourage more forest expansion. |
| A．The urgency of the strategy. |
| B．The importance of forests. |
| C．The background of the strategy. |
| D．The environmental role of forests. |
| A．Preserved. | B．Controlled. | C．Removed. | D．Damaged. |
| A．Planting Trees for the World |
| B．Irreplaceable Benefits of Forests |
| C．EU’s Action to Protect the Earth |
| D．Taking Forests into the Future |
7 . For years, twice a day Aadya Joshi walked past a dump filled with smelly rubbish in her neighbourhood of south Mumbai on her way to and from school. Originally it was meant to be the garden of the local police station. When she was 15, during her summer holidays, Joshi decided to do something about it. “I walked into the police station and was like, ‘Can I please clean your garden?’” recalls Joshi. “It took three or four weeks to eventually convince them that I was not going to give up halfway and leave them with more work.”
The plot of land covers an area of 60 square meters, about a quarter of a tennis court. But, over the course of four Sundays in the summer, with help of local residents, Joshi did more than clear it. She replanted it with native Indian plants and trees. Joshi said, “The first day that we cleaned up I made the mistake of not wearing gloves and I was sick for two weeks.”
The idea for native planting came from Joshi’s reading on the Miyawaki method of afforestation (植树造林) and the work of University of Delaware ecologist Douglas Tallamy. These both argue that planting the right trees can have a significant impact on restoring insect and animal biodiversity. The results in Mumbai were instantaneous: monkeys now hang out at the police station, and butterflies and birds have made the garden their home.
After creating the garden, Joshi developed a database of 2,000 plants unique to the Indian subcontinent and last year was awarded the annual Children’s Climate prize, founded by Swedish energy company Telge Energi. Her advice for others looking to follow in her footsteps: “If you bite off more than you can chew in the beginning, you will be stuck and lose motivation,” she says. “But something small, like your neighbourhood police station, it’s very manageable.”
1. What can we learn from Joshi’s words in the second paragraph?| A．The work was enjoyable and rewarding. |
| B．The garden was too large to clean. |
| C．The cleaning was hard and dangerous. |
| D．Joshi was sick of the cleaning work. |
| A．Dangerous. | B．Profitable. | C．Costly. | D．Immediate. |
| A．All roads lead to Rome. |
| B．Time and tide wait for no man. |
| C．The longest journey starts from the first step. |
| D．Whatever is worth doing is worth doing well. |
| A．To demonstrate the environment problems. |
| B．To call on attention to India’s young people. |
| C．To persuade readers to donate to a environment program. |
| D．To advocate a teenager’s efforts in caring about the world. |
8 . Coral reefs are the rainforests of the ocean. They exist on vast scales and are equally important havens of biodiversity. Reefs occupy 0.1% of the oceans.
Corals are useful to people. Without the protection which reefs afford from crashing waves, low-lying islands such as the Maldives would have flooded long ago, and a billion people would lose food or income. However, reefs are under threat from rising sea temperatures. Heat causes the algae (海藻) with which corals are living together to generate toxins (毒素) that force those coral to leave.
Research groups around the world are coming up with plans of action to see if that will help, such as identifying naturally heat-resistant corals and cross-breeding such corals to create a new type.
Doubters doubt humanity will get its act together in time to make much difference.
| A．This can cause a coral’s death. |
| B．But there are grounds for optimism. |
| C．And they host a quarter of marine species. |
| D．Coral’s global ecosystem services are worth up to $10trn a year. |
| E．This mix of natural activity and human intervention is important. |
| F．This research can also be brought to bear on trying to save entire ecosystems. |
| G．However, the assisted evolution of corals does not meet with universal enthusiasm. |
9 . A Plastic Ocean is a film to make you think. Think, and then act. We need to take action on our dependence on plastic. We’ve been producing plastic in huge quantities. Drinking bottles, shopping bags and even clothes are made with plastic.
The film begins as a journey to film the largest animal on the planet, the blue whale. But during the journey the filmmakers make the shocking discovery of a huge, thick layer of plastic floating in the Indian Ocean.
In the film there are beautiful shots of the seas and marine life.
We make a shocking amount of plastic. Over 300 million tons of plastic are produced every year, and at least 8 million of those are thrown into the oceans. The results are very harmful, but it isn’t too late to change.
| A．It has raised public concern all over the world. |
| B．In conclusion, we only have one earth to live on. |
| C．But the film doesn’t only show the negative side. |
| D．These are contrasted with plastic rubbish thrown around. |
| E．Once you’ve seen the film, you’ll realize it is time to do our part. |
| F．This causes them to travel globally to look at other affected areas. |
| G．We live in a world full of plastic, and only a small amount is recycled. |
10 . New Zealand’s government recently announced it will help pay for poorer families to replace their old cars with cleaner hybrid(混合动力的)or electric vehicles. The government said it plans to spend $357 million on the test program.
The move is part of a wider plan to reduce greenhouse gas emissions. Greenhouse gases are believed to cause warming temperatures in the Earth’s atmosphere. New Zealand plans to provide aid for businesses to reduce emissions and have buses that run on environmentally safe fuel by 2035. The government also plans to provide food-waste collection for most homes by 2030.
Prime Minister Jacinda Ardem said in a statement, “We’ve all seen the recent reports on sea level rise and its influence right here in New Zealand. We cannot leave the issue of climate change until it’s too late to fix.” The plan is a step toward New Zealand’s stated goal of reaching net-zero carbon emissions by 2050.
Reaching net-zero emissions means not creating more carbon in the atmosphere than oceans and forests can remove. Ardern said that reducing dependence on traditional fuels would help protect families from extreme price increases. The plan also sets a goal of reducing total car travel by 20 percent over the next 13 years. The programs will be paid for from a $2.8 billion climate emergency response fund.
Officials said that over time, money collected from polluters would pay for the programs rather than taxes from families. Some critics of the plan say it continued to be less restrictive on New Zealand’s huge agriculture industry. Agriculture creates more than half of the nation’s total greenhouse gas emissions. But the industry is also important to the economy as the nation’s biggest export earner.
David Seymour is the leader of New Zealand’s ACT political party. He said that some of the announced programs are proven to be ineffective and have been tried and failed overseas. Seymour added that people should be able to choose how they reduce emissions through the market-basedd emissions trading plan.
1. Which of the following is NOT New Zealand planning to do?| A．Buy cars for poor families. | B．Offer assistance to business. |
| C．Use environmentally safe fuels. | D．Spend money on the test program. |
| A．Setting aside the problem. | B．Realizing the stated goal. |
| C．Addressing the issue early. | D．Decreasing dependence on traditional fuels. |
| A．New Zealand aims to control carbon emissions. |
| B．The move has a goal of reducing the use of buses. |
| C．Achieving net-zero emissions means creating no carbon. |
| D．Agriculture makes less importance in the nation’s economy. |
| A．Negative. | B．Objective. | C．Favorable | D．Unconcerned. |
