1 . Labels placed on fast food items stressing their high climate impact may influence consumers to make more sustainable (可持续的) choices, new study results show.
Food accounts for around one-third of all human-made greenhouse gas emissions, while animal-based foods like red meat and dairy products make up a large part of these emissions.
Researchers carried out a randomized clinical trial with more than 5,000 participants to determine whether calling attention to red meat’s climate impact could change consumer menu selections.
Individuals were shown a simple online fast food menu and asked to select an item for dinner. A control group received a menu with a quick response code label on all items and no climate labels. Another group received a menu with green low-climate impact labels, positively framing choices like fish, chicken, or vegetarian choices. The third group received a menu with red high-climate labels on items containing red meat, negatively framing the choices.
Results showed 23 percent more participants in the high climate label group ordered a sustainable, non-red meat choice, and 10 percent more in the low-climate group ordered a sustainable choice, compared with controls.
“In the United States, meat consumption, red meat consumption in particular, often exceeds (超过) recommended levels based on national dietary guidelines,” researchers wrote in the study. “Shifting current dietary patterns toward more sustainable diets with lower amounts of red meat consumed could reduce diet-related greenhouse gas emissions by up to 55 percent.”
Extra red meat consumption can also be harmful to human health and has been linked with increased risks of diabetes and certain cancers. Fast food restaurants are a key source of red meat in many Americans’ diets, authors noted, adding more than one-third of U.S. individuals consume fast food on a given day.
“These results suggest that menu labeling, particularly labels warning that an item has high climate impact, can be an effective strategy for encouraging more sustainable food choices in a fast food setting,” said lead study author Julia Wolfson, an associate professor from the Johns Hopkins University Bloomberg School of Public Health.
1. What does paragraph 4 mainly talk about?| A．The research objects. | B．The research findings. |
| C．The research purpose. | D．The research process. |
| A．Changing. | B．Removing. | C．Gathering. | D．Searching. |
| A．Consumers prefer labeled menus. | B．Red meat can result in many diseases. |
| C．Menu labeling helps reduce climate impact. | D．Two-thirds of Americans like to eat fast food. |
| A．Fast Food and Climate Change | B．Menu Labeling for Greener Choices |
| C．Increasingly Popular Menu Labeling | D．Red Meat Consumption and Health Risks |
2 . Plastic is everywhere in our modern world. Its toughness makes it an extremely useful material from household items to vehicle parts, but that same toughness makes it hard to break down for recycling or disposal (处理). However, Japanese scientists at the University of Tokyo have developed a new plastic material that can be broken down more easily and can self-heal and remember past shapes.
Based on a kind of plastic called an epoxy resin vitrimer, which is brittle (脆性的), the new plastic has a huge range of advantages. Once scratched (刮划) with a knife, it can completely patch itself up after being heated to 150 ℃ for just 60 seconds. When shaped into the shape of a crane, then flattened, it can fold itself back into the crane shape by being heated up. It does all of this much faster than others of its type.
The new plastic can also break down easier. Even if it’s thrown into the environment, it still has less of a problem than other kinds of plastic, which the team demonstrated by placing it in seawater for 30 days. It biodegraded (生物降解) by 25% and released something that is eatable for ocean life.
The new plastic is more resistant to breaking. It can also repair itself, and can recover its original memorized shape. It even biodegrades safely in a ocean environment, according to Shota Ando, a researcher of the study.
The material can be used in a variety of applications. “Building materials for roads and bridges are often composed of epoxy resins mixed with compounds (化合物) such as concrete and carbon,” said Ando. “By using the new plastic, these would be easier to maintain as they would be stronger and healable using heat. Unlike conventional epoxy resins, this new material is hard but flexible, so it could also be expected to strongly bond materials of different hardness and stretch.”
1. What is the author’s purpose in writing paragraph 1?| A．To introduce the topic of the text. | B．To show the disadvantages of plastic. |
| C．To highlight the importance of plastic. | D．To show his views on previous plastic. |
| A．Change itself. | B．Destroy itself. | C．Repair itself. | D．Burn itself. |
| A．It is safe for animals in the ocean. | B．It is made up of concrete and carbon. |
| C．It can change its shape when frozen. | D．It is more brittle than previous plastic. |
| A．How to Make a New Plastic | B．An Interesting Scientific Study |
| C．The Widespread Application of Plastic | D．A New Environmentally Friendly Plastic |
A composting (堆肥) program at The Wesley School in Los Angeles is helping students get hands-on experience and ways
The school’s composting program
The school will use the compost on plants around campus. Some will
It takes two hours for the container to be emptied and prepared to receive
4 . Many disaster-relief programs transport tons of supplies, such as food, water and heavy equipment, by road using large trucks. But some supplies may weigh just a few kilograms or less. For example, a package might contain a few doses of life-saving medicine.
The parachutes (降落伞) that carry these packages from planes are often made of nylon (尼龙). After one use, these parachutes are usually discarded. Because nylon is a polymer (聚合物), it does not decompose quickly. Therefore, Natalie looked for a greener alternative.
Nylon is strong, but a parachute used only once for light packages does not need to be that strong. Paper might be good enough, thought the teen. Plus, a paper parachute can be folded into a tiny package, just like a fabric parachute. Moreover, she notes there are many different ways to fold the unopened paper parachute.
Natalie came up with several folded designs and tested them. Her first models were small, so she could test them indoors. Two were triangular (三角形的). Two more were rectangular (长方形的). One of the rectangular ones opened most smoothly, she found. It also fell and landed most steadily as it dropped through the air. “Such features can be important when the goal is to deliver a package to the ground softly and accurately,” she says.
Natalie showcased her designs at the Intel International Science and Engineering Fair. Natalie’s single-use paper parachutes are not harmful to the environment. They are also less expensive than parachutes made from more traditional materials. A nylon parachute of the same size as her design would cost about $31, she says. One made from silk, another common parachute fabric, would cost almost $16. But a parachute made from paper would likely cost less than $1, Natalie estimates.
1. Why are many relief supplies mentioned in the first paragraph?| A．To list an example. | B．To answer a question. | C．To lead in the topic. | D．To make a comparison. |
| A．Go bad. | B．Break down. | C．Run away. | D．Bend down. |
| A．A small one. | B．A big one. | C．A rectangular one. | D．A triangular one. |
| A．Reducing Environmental Impact with Paper Parachutes |
| B．Eco-friendly Paper Parachutes for Disaster Relief |
| C．The High Cost of Traditional Parachutes |
| D．A Teen’s Quest for Better Disaster Relief |
5 . In Colombia a group, named WebConserva, is carrying out a project in the San Lucas Mountains with the help of coffee growers.
The San Lucas area is one of the most unexplored places in Colombia, which is home to many thousands of species of animals and plants. Yet gold mining and coca farming have done much damage to its ecosystem. To limit additional development in the San Lucas area, the group helps coffee growers by linking them with processors (加工者) from around the country.
Colombia has more different kinds of living things than any other country except neighboring Brazil. In 2016, the Colombian government signed a peace deal with the Revolutionary Armed Forces of Colombia ending years of civil war. As a result, more land became accessible for use, with deforestation (毁林) coming along. Government information shows that in 2017, almost 220,000 hectares of forest were destroyed compared to around 124,000 hectares in 2015.
To date, the project includes 10 families who farm 400 hectares of coffee plants, which costs about $77,000 dollars a year. WebConserva hopes that, in time, 200 families will be included. At that level, 20,000 hectares of untouched forest could be protected. In San Lucas, the families promise not to cut down trees to expand their crops or to hunt wild animals from the forests. In return; they receive $250 to $300, per 125 kilograms of coffee, an enviable amount there. Arcadio Barajas is among those taking part. His new coffee farm makes a barrier (屏障) between cattle farms and forests where wild animals like the jaguar live and hunt. In this way, he doesn’t have to kill wild animals to protect his cattle.
Barajas said that pulling down the forest to plant coca and killing wildlife were against his will. Now he feels that growing coffee lets him be a steward of the land. “I’m taking care of the environment, the forest and the animals,” he said.
1. Why does WebConserva set up the project?| A．To help local farmers make money. | B．To expand areas of coffee growing. |
| C．To link processors with coffee growers. | D．To conserve biodiversity in the Mountains. |
| A．Colombia helped many needy families. | B．Colombia lost lots of areas of forests. |
| C．Colombia started to save damaged forests. | D．Colombia became more peaceful than Brazil. |
| A．A method of protecting cattle and wildlife. | B．A substitute for hunting of wild animals. |
| C．A barrier between man and wild animals. | D．A shelter for cattle against human hunters. |
| A．farmer | B．developer | C．guardian | D．explorer |
| A．The environment. | B．An activity. | C．A lifestyle. |
7 . In the northernmost edge of Colombia sits the coastal town of Acandí. Access to the town is only by water or air; there is no road that leads there. The residents there are faced with the struggles of balancing livelihoods while protecting biodiversity.
In the past, traditional community fishing methods, passed down by the elders, focused on the reasonable fishing and management of resources. However, the introduction of large-scale trawling vessels(拖网渔船) decades ago gradually depleted the area’s fishing resources, leading to damage to marine(海洋的) life seriously.
Jesús Antonio Julio Cuestas, who serves in the region’s conservation and management of marine resources, stresses the bad impact of these developments and calls for new fishing techniques. “Fishing and conservation co-exist as long as we have good management practices and reasonable use of our fishing resources,” says Cuestas. He and other officials actively monitor fishing activities in Acandí. Each morning, they visit the fish markets to gather data on fishery resources—including prices and sizes—to monitor the state of the local fishing industry.
Along with Cuestas, the fishers work to reduce their impact on the marine ecosystem. By changing fishing methods and adopting new practices, they aim for a more balanced approach to fishing. “This year the local fishermen have not used the trawl net s that were causing the death of the leatherback sea turtles,” explains Cuestas proudly. Changes include the efforts of boats to protect the seagrass that serves as feeding grounds for marine life and an end to fishers throwing net s where turtles lay their eggs.
This marine reserve in Acandí, Cuestas believes, is their greatest treasure. He attaches great importance to working together with local residents to improve the quality of life while preserving the marine ecosystem. By doing so, he imagines a picture where individuals from the fishing community can pursue various careers, such as engineers or lawyers, proudly stating that they are the products of the fishing tradition in Acandí.
1. What does the underlined word “depleted” in paragraph 2 mean?| A．Reused. | B．Restored. |
| C．Explored. | D．Reduced. |
| A．To cut down on the costs of fishing. |
| B．To improve the income of local residents. |
| C．To promote the well-being of marine wildlife. |
| D．To spread traditional community fishing methods. |
| A．The aim of the changes to fishing methods. |
| B．The efforts to preserve marine ecosystem. |
| C．The results the trawl net s have brought about. |
| D．The impact of fishers on the local environment. |
| A．Confident. | B．Uncaring. |
| C．Concerned. | D．Doubtful. |
8 . There are hundreds of great national nature reserves in China. Now feast your eyes on the following amazing ones.
Qinghai Lake National Nature ReserveQinghai Lake, China’s largest saltwater lake in Qinghai Province, is a key body of water for lots of animals and birds. As an important stopover, migratory birds (候鸟) would rest in this area during their movement trip every year. The reserve became a national nature reserve in the year of 1997.
Bayanbulak National Nature ReserveThe only Bayanbulak Wetland, in Xinjiang Uygur Autonomous Region, is at the foot of Tianshan Mountains, which makes itself suitable for migratory birds. Bayanbulak means “rich spring water” in Mongolian, meaning that the area is rich in water. Every year, swans (天鹅) from different places fly here for nesting, which became a national swan reserve in 1986.
Rongcheng Swan National Nature ReserveAs one of the largest wintering places for swans in China, this reserve in Shandong Province mainly protects whooper swans (大天鹅), which make it different from other nature reserves. In 2007, it was changed into a national nature reserve. Now every year, thousands of whooper swans arrive here to spend the winter, making it an important resting and wintering place for themselves.
Sanya Coral Reef (珊瑚礁) National Marine Nature ReserveThis reserve focuses on protecting coral reefs and their living environment in Sanya City, Hainan Province. In 1990, it became a national nature reserve. This reserve is on the coast, so the area of the reserve has good water quality and many kinds of creatures,
1. What do the first reserve and the second reserve have in common?| A．The area of wetland. | B．The geography of them. |
| C．The year of becoming the national reserve. | D．The friendly environment for migratory birds. |
| A．Its saltwater lake. | B．The whooper swans. |
| C．Its rich spring water. | D．The warm climate. |
| A．Bayanbulak National Nature Reserve. | B．Qinghai Lake National Nature Reserve. |
| C．Rongcheng Swan National Nature Reserve. | D．Sanya Coral Reef National Marine Nature Reserve, |
9 . Scientists have reported that the sea ice in Antarctica (南极) is at a record low level. Antarctica is a great, icy land, surrounded (围绕) by the huge Southern Ocean. The ice in Antarctica doesn’t just cover the land. There’s also a large area of sea ice on the ocean’s surface.
Every year, the sea ice at the South Pole goes through a cycle. In the summer, the huge sea ice melts (融化) to its smallest point. Over the colder winter months, the sea ice grows and grows until it covers a wide area. Usually, the sea ice covers the greatest area around September 23, as winter ends at the South Pole.
Scientists have been measuring the area of the sea ice in Antarctica since 1979. For most of this time, Antarctica has seemed to be almost unaffected by the changing weather conditions experienced in other parts of the globe. That began to change around 2016. Now, for several years, the area of Antartica’s sea ice has been shrinking.
This year, the US National Snow and Ice Data Centre (NSIDC) reported that Antartica’s sea ice covered its greatest area on September 10 — almost two weeks earlier than normal. And the sea ice was at a new record low-not just by a little bit, but by a lot.
The last time Antartica’s low sea ice set a record at the end of winter was in 1986. And this year, there’s about 398, 000 square miles less sea ice than in 1986.
Scientists are still trying to understand what is driving the change in Antarctica. One likely direct cause for the change is the rising temperatures of the world’s oceans. Ted Scambos, a research scientist at the University of Colorado, says Antarctica’s ice levels have always changed some, but the sharp loss this year is “pointing towards warmer ocean conditions around the continent.”
The new low record has concerned the scientists. Scientists are working hard to better understand Antarctica. They don’t know yet if this is just a short-term problem, or part of a long-term shift (转变) towards less sea ice in Antarctica.
1. What does the underlined word “shrinking” mean in Paragraph 3?| A．Getting smaller. | B．Being flat. | C．Observed. | D．Measured. |
| A．To give an example. | B．To make a comparison. |
| C．To make a summary. | D．To offer an argument. |
| A．The changing weather conditions. | B．Human activities in Antarctica. |
| C．Increased volcanic activities in the area. | D．The increasing temperatures of the global oceans. |
| A．Worried. | B．Annoyed. | C．Excited. | D．Satisfied. |
10 . Most of us have heard of the 3Rs: reduce, reuse and recycle. It is the core principle of a sustainable (可持续的) life, but few of us can apply it in our own lives. Now, there’s a “lab” you can explore and discover a way toward living sustainably.
3R Lab is located in Xuhui district, Shanghai. It offers exhibitions, activities and goods that showcase the 3R principle. The key to a sustainable life, according to Vincent T. M. Fong, the 32-year-old from Hong Kong who created the lab, is to make it a long-term promise. “A sustainable life should be sustainable itself in the first place. You can’t lead a sustainable life on a whim. Small and comfortable changes are exactly what you need,” Fong said.
The lab regularly hosts ugly fruit markets, offering these strange fruits which are often thrown away by traditional markets and consumers at a quite attractive price. “They’re thrown away simply because of their appearance. Buying fruit regardless of how they look reduces food waste significantly in our daily life,” Fong commented.
A water tank with two types of straws is another equipment in the lab. “One type is made from normal plastics widely used in our daily life while the other is from PHA, a new replacement for plastics, and the water is sourced from the Suzhou River,” explained Ni Li, an employee of the lab. Visitors can see how the PHA straws degrade (降解) into a thin layer in just one month, while the others remain unchanged.
“Leading a sustainable life does not necessarily mean sacrifice,” said Fong. Consuming ugly fruit and using degradable plastics are small changes that are good for the environment and easy to stick to. Only in this way can the 3R principle become part of our lives, he added.
After working there for six months, Ni, who wasn’t mindful of the 3R principle before arriving at the lab, now uses her cup every time she buys a coffee. “The job has reshaped my life,” Ni said.
1. What does the-underlined phrase “on a whim” in the second paragraph probably mean?| A．In a rush. | B．On a regular basis. |
| C．Without any reason. | D．As a common practice. |
| A．To reduce food waste. | B．To promote healthy eating. |
| C．To sell new kinds of fruit. | D．To provide more affordable fruit, |
| A．The water pollution caused by plastics. | B．The degradation of PHA straws. |
| C．The interaction between two types of straws. | D．The disappearance of normal plastic straws. |
| A．She avoids going to traditional markets. | B．She has devoted less time to her hobbies. |
| C．She has got rid of a few bad habits. | D．She is leading a low carbon life now. |
