1 . Beginning 2020, the fifth generation of wireless technology is expected to be widely used throughout the world. The new network, called 5G, promises to give faster speeds and a higher capacity for the use of more devices. However, while some companies are competing to be the first to deliver 5G to the consumer, the environmental influences of the new network are being overlooked.
There is some evidence that the new devices and technologies associated with 5G will be harmful to ecosystems. The main component of the 5G network that will affect the earth's ecosystems is the millimeter waves. The millimeter waves that are being used in developing the 5G network have never been used at such scale(规模)before. Studies have found that there are some harms caused by these new technologies.
The millimeter waves, specifically, had a detrimental effect on birds. In a study, researchers observed that after exposure to radiation from a cell tower for just 5~30 minutes, the eggs of sparrows were disfigured. The disfiguration of birds exposed for such a short amount of time to these frequencies(频率)is significant considering that the new 5G network will have a much higher density(浓度)of base stations(small cells) throughout areas needing connection. The potential dangers of having so many small cells all over areas where birds live could threaten their population's survival.
Additionally, it was found that cellular devices were linked to many disturbances in the ecosystems of bees. In this study, beehives exposed for just ten minutes to 900MHz waves fell victim to colony collapse disorder(蜂群崩坏症候群). Bees are an incredibly important part of the earth's ecosystem. Around one-third of the food produced today is dependent on bees for pollination(授粉), making bees are a vital part of the agricultural system.
The impact that the cell towers have on birds and bees is important to understand, because all ecosystems of the earth are interconnected. If one component of an ecosystem is disrupted the whole system will be affected.
1. What will probably cause the environmental problems with the wide use of 5G network?| A．The lack of the density of base stations. |
| B．The less mature devices and technologies. |
| C．The lower capacity for the use of devices. |
| D．The large amount of use of millimeter waves. |
| A．Important. | B．Unknown. | C．Harmful. | D．Potential. |
| A．They play a key role in food production. |
| B．They can guide some pollinators to work. |
| C．They are likely to reduce unpleasant noises. |
| D．They rid disturbances in the agricultural system. |
| A．Should 5G Be Used in the Future? | B．The Influence of 5G on Ecosystem |
| C．The Research on 5G Technologies | D．How Can Ecosystem Survive 5G? |
2 . Padraig ó Dubhlaoidh,an Irish master violin maker，has created the world’s first-ever vegan violin,valued at 8, 000.
An amateur violinist himself, Padraig ó Dubhlaoidh has long held the belief that animal body parts aren’t needed to create the instrument.“With our planet facing crises on almost every front, the collective voice of people wanting a fairer future grows stronger every day, ”he said.“ Ethical(合乎道德的)musicians are part of this movement and have long wished for a violin that is fully vegan yet retains all the qualities of the classic instrument.”
Traditional instruments are tightly connected to animal products.Like other wood-based instruments, violins use hide glue-a product obtained from the skins and bones of animals-as a primary adhesive(黏合剂).Violin strings and bows have also been known to contain ivory and horse tail hair. Using traditional tools and methods, Padraig chose natural replacements such as steamed pears, berries, and spring water to create the instrument. His adhesive, composed in part of spring water gathered from the hills behind his home, is 100%natural.
More than just an ethical step in the right direction, Padraig says his natural adhesive has other advantages.He said, ”During my experiments, I discovered that the vegan violin has unexpected advantages.Apart from the benefit to animals, society, and our environment, it has become very clear that animal-based glues have harmful effects on violins, inducing powerful tension on wooden components.The adhesive used in my vegan violin, however, has no such effect.This is an acoustic(声音的)improvement.”
While Padraig doesn’t think everyone will switch to the vegan violin immediately, he does think there’s a bright future ahead for his instrument and the concept of vegan instruments. He continues to make both vegan and non-vegan violins in his workshops. However, he said, “Just as petrol cars are gradually being replaced with more eco-friendly options, the same progression may happen to violins gradually, and even many other handicrafts.”
1. What’s Padraig’s original purpose in making the vegan violin?| A．To help protect the earth. |
| B．To have a stronger violin body. |
| C．To enhance the qualities of violins. |
| D．To inspire more musicians to play classical music. |
| A．The process of making instruments. |
| B．The features of traditional instruments. |
| C．The reasons for instruments’ containing animal products. |
| D．The comparison between traditional instruments and the new violin. |
| A．It does no harm to animals. |
| B．It produces even better sounds. |
| C．It needs further improvements. |
| D．It has many unknown functions. |
| A．They will face great challenges. |
| B．They will experience ups and downs. |
| C．They will be acknowledged gradually. |
| D．They will be sold at affordable prices soon. |
3 . After spending 589 days picking up litter or rubbish at one of Los Angeles County’s most popular hiking spots, 20-year-old Edgar McGregor says the park is clean of waste.
McGregor’s journey was sparked by an Olympic dream. When he learned Los Angeles would be hosting the 2028 summer games, he worried that its national forest with litter everywhere would become a “global embarrassment” and took it upon himself to start cleaning.
McGregor decided to start with Eaton Canyon, the closest of the Angeles National Forest parks to where he lives. It has miles of crisscrossing trails, popular waterfalls, eleven storm drains, seven homeless encampments, five entrances, four parking lots and more than two miles of streambeds. At the beginning, he thought that cleaning the park would take 10 to 20 days. It took 589 days.
On his largest solo cleanup day, McGregor spent 300 minutes clearing an area less than one acre in size. He filled a previously empty dumpster (垃圾箱) with more than 1,000 pounds of trash. He ventured out in extreme weather, including during the state’s record heat wave in September, after a January snowstorm, and even while the other side of the park was actively on fire.!
After months of park cleanliness, McGregor noticed several weeks ago that he was running out of locations to clean-even the spots that were usually reliable sources of litter were mostly empty.
“Not worrying about litterbugs and simply immersing myself in this work has made me more excited than ever to go out every single day and pick up,” McGregor said “There is nothing more satisfying than seeing brand new animals return to your park after months of cleaning up. I highly encourage anyone with any spare time to give this mission a shot. Your parks need you.”
1. Why did McGregor decide to pick up trash in Los Angeles?| A．To raise money for wildlife there. |
| B．To improve its global image. |
| C．To qualify it for the Olympic Games. |
| D．To make good use of the waste. |
| A．The route of the cleanup. |
| B．The park’s recycling system. |
| C．The challenges of the cleanup. |
| D．The popularity of Eaton Canyon. |
| A．Demanding. | B．Disturbing. |
| C．Discouraging. | D．Rewarding. |
| A．Nothing is impossible to a willing heart. |
| B．A man can be destroyed but not defeated. |
| C．The secret of getting ahead is getting started. |
| D．Life is what happens to you while you’re busy making other plans. |
4 . Imagine an area 34 times the size of Manhattan. Now imagine it covered ankle-deep in plastic waste—a total of about 19 billion pounds of garbage.
“We’re being overwhelmed(淹没) by our waste,”said Jenna Jambeck, an environmental engineer who led the 2015 study that determined this astonishing number.
Plastic—a widely-used material—has in many ways been a benefit to humans but it has also caused a growing problem. Today, plastics are the No.1 type of garbage found in the sea. Ocean Conservancy, a nonprofit that organizes an annual coastal cleanup event worldwide, said plastic waste makes up around 85 percent of the garbage collected from beaches and oceans.
Ocean Conservancy says plastics are believed to threaten(威胁)at least 600 different wildlife species(物种).
| A．The following is what we should do |
| B．And it’s not just wildlife that’s threatened |
| C．And this figure is likely to double by 2025 |
| D．But it’s not just countries that need to do their part |
| E．By 2050,that figure is expected to rise to 1000 pieces |
| F．That’s how much plastic waste ends up in our oceans every year |
| G．All of us have an important role to play in dealing with the problems |
5 . In 1960 the Aral Sea was one of the world’s largest inland water bodies, covering an area of approximately 68,000 square kilometers (26,000 square miles). By the year 2000 the area covered by the Aral Sea had become less than half its 1960 size, its volume reduced by 80 percent. By about 2010 all that will remain will be three shallow remnants.
What caused the Aral Sea to evaporate over the past 40 years? As recently as 1965, the Aral Sea received about 50 cubic kilometers (12 cubic miles) of fresh water per year. By the early 1980s this number had declined to nearly zero. The reason was that the waters of the Amu Darya and Syr Darya had been diverted to supply a major expansion of irrigated agriculture in this dry realm.
The intensive irrigation has greatly increased agricultural productivity, but not without significant costs. The deltas of the two major rivers have lost their wetlands, and wildlife has disappeared. The once thriving fishing industry has been eliminated, and the 24 species of fish that once inhabited the Aral Sea are no longer there. The shoreline is now tens of kilometers from the towns that were once fishing centers.
The shrinking sea has exposed millions of acres of former seabed to sun and wind. The surface is covered with salt and agrochemicals brought by the rivers. Strong winds routinely pick up thousands of tons of newly exposed materials every year and deposit them throughout the region. This process has not only contributed to a significant reduction in air quality for the region’s population, but has also appreciably reduced crop yields due to the deposits of salt-rich sediments on farmable land.
The shrinking Aral Sea has had a noticeable impact on climate. Without the moderating effect of a large water body, there are greater extremes of temperature, a shorter growing season, and reduced local precipitation. These changes have caused many farms to switch from growing cotton to growing rice, which demands even more diverted water.
1. Why have crop yields been reduced on the land surrounding the Amu Darya and the Syr Darya?| A．The Aral Sea no longer provides the land with fresh water for irrigation. |
| B．The farmers have stopped using chemical fertilizers. |
| C．The salt content of the soil has increased. |
| D．Erosion due to wind has increased. |
| A．forcefully |
| B．necessarily |
| C．unfortunately |
| D．regularly |
| A．Rice requires less water. |
| B．Rice is cheaper to grow. |
| C．Rice needs a shorter growing season. |
| D．Rice has less impact on climate. |
6 . A student-led push to get solar panels installed at a middle school in Tacoma is receiving national recognition from a clean energy nonprofit organization called Generation 180. The girls involved are advocating and fundraising for the project.
Sammy Firkins, Gwen Newport and Annie Son will talk about their idea to generate solar electricity at Jason Lee Middle School in a panel discussion organized by Generation 180. In 2019, the three of them teamed up with their science teacher, Kathy Hall, to push for solar panels to be installed. Hall, who uses solar power at her own house, said it’s long been a dream of hers. The school would be the first in the Tacoma district to use solar energy.
The girls presented their idea to Gov. Jay Inslee’s STEM Education Innovation Alliance meeting in early 2019 and received enthusiastic support. They then spoke to the Tacoma school board and obtained buy-in from the district, though they were told the district did not have the roughly $ 200,000 for the 277 solar panels and that they would have to fundraise. They’ve since raised more than half that amount through grants and individual donations.
Gwen Newport said she’s always cared a lot about environmental issues and that she’s troubled that climate change does not get the attention it deserves. “At this point, I feel like it’s kind of been given to my generation almost as our responsibility now and so being able to be a part of this project and take action is really important to me,” she said.
The solar panels have not been installed at the school yet. But Hall said she estimates that the project will reduce the school’s power costs by about $ 14,000 a year, and that it also will serve an educational purpose. “We will have live data always streaming available so that people can see how the panels are working and how they relate to the amount of electricity we’re using, and it will be an incredible learning tool,” she said.
1. What is Generation 180?| A．It is the name of the girls’ team. |
| B．It is a project to use solar power. |
| C．It is a nonprofit environmental group. |
| D．It is a student-led push to install solar panels. |
| A．The girls raised enough money for the project. |
| B．The Tacoma school board rejected the project. |
| C．The girls made great efforts to fulfill the project. |
| D．The district covered the expenses of solar panels. |
| A．Confident. | B．Concerned. | C．Relieved. | D．Content. |
| A．To advocate for donations. |
| B．To serve as a learning tool. |
| C．To protect the environment. |
| D．To cut down the school’s expenses. |
7 . Every year, butterfly(蝴蝶) lovers in California go out in November to count monarch butterflies. They
The orange and black monarch butterflies are famous
Monarchs, like most butterflies, are
But monarchs have been facing growing problems for years. As more and more wild land has been turned into large farms, the monarchs have had trouble
Scientists say monarchs will be in danger of dying out in the next 20 years if nothing
1. 环境保护的重要性；
2. 你在活动中的表现；
3. 你的感受。
注意：1. 写作词数应为80左右；
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Dear Lucas,
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua
9 . In the past five years, about 2.8 billion of school textbooks were sold per year, with total spending of 20 billion yuan ($3 billion), news magazine Outlook Weekly reported, citing data released recently by the National Press and Publication Administration.
If these textbooks are reused for one year, the costs saved can be used to help build around 40,000 Hope Schools in impoverished regions.
The figures show that in 2018, the number of retailed textbooks for primary and secondary schools was 2.93 billion copies, totaling 25.99 billion yuan. If all of them are reused, a total of over 20 billion yuan will be saved per year.
Zhao Dehua, in charge of a company recycling resources, said many college graduates sell the textbooks they have accumulated over the years at an average price of 1 yuan per kilogram. As these textbooks are mostly used to produce recycled paper, the cost is even higher than that of raw paper as the processing procedure of recycled paper is complicated.
At present, free textbooks related to music, art and P.E for the nine-year compulsory education have been reused, but account for less than a fraction of the total number of textbooks. Because of the supply chain obstruction, which increases the costs to match supply with demand, the lack of sound platform and service supporting system for the second-hand textbook trade, most of the textbooks used for compulsory education and higher education end up as waste.
“Every year, second-hand booksellers collect textbooks at a price of about 4,000 yuan a ton, which is more than twice the price of ordinary waste paper, but the number of people who come to collect second-hand books is still few,” Zhao Dehua said.
Besides, the incomplete policies and regulations might bring second-hand book sales platforms and sellers to legal risks.
“Establishing the system of textbook recycling can not only save resources, but also help to cultivate students’ consciousness and sense of responsibility,” said Zhu Pin, deputy head of a school of nine-year compulsory education in Jiangxi province. The school has set up a system for reusing the textbooks and the books are disinfected every week.
1. What can we learn from paragraph 4?| A．College students sell textbooks in order to make profits. |
| B．Recycled paper is mainly used for environmental considerations. |
| C．The cost of recycled paper is greater than that of raw paper. |
| D．Certain groups of collectors tend to choose second-hand textbooks. |
| A．It is blocked because of lack of funds. |
| B．The supply of recycled textbooks is not adequate to meet the demand. |
| C．The regulation of second-hand textbooks has not been carried out yet. |
| D．A large number of second-hand textbooks are not used properly. |
| A．The school frees recycled textbooks from bacteria regularly. |
| B．The school proposes regulations for wasting second-hand textbooks. |
| C．The school calls on students to participate in the system of textbook recycling. |
| D．The school requests the government’s support. |
| A．Textbooks recycled for less waste |
| B．Recycled textbooks used for compulsory education |
| C．Reusing textbooks good for environment and wallet |
| D．Reusing textbooks good for collection |
10 . Men’s consumption habits are worse for the planet than women’s, according to a new study. For the study, consumption-based greenhouse gas (GHG) emissions were measured for the average individual, the average single male, and the average single woman. These were 6, 9, 10, and 8.5 tonnes per capita per year respectively, and more than half of those amounts were due to food, holidays, and furnishings.
What’s interesting is that single men and women spend similar amounts of money on consumer goods, but men’s choices lead to 16% more GHG emissions than women’s. That is because they choose to spend money on things like cars and driving, rather than taking public transportation or trains, as women are more willing to do. More of men’s money goes toward alcohol, tobacco, and eating out, while women often spend money on clothes, home furnishings, and health-based purchases.
Curiously, there were no differences in the carbon footprints of men’s and women’s diets. While men tend to eat more meat, women make up for that in dairy products, which are also carbon-intensive foods.
Lead study author Mannikin Okayama says she wasn’t surprised by the findings because previous research had showed similar differences between single men and women regarding energy use. Instead, she expressed surprise at the fact that more studies haven’t been done on gender differences in environmental impact. “There are quite clear differences and they are not likely to go away in the near future.”
The purpose of the study was to examine where individuals could make changes to their consumption habits in order to shrink their carbon footprints. The researchers looked for ways that would require minimal additional spending, so as to be more accessible to a greater number of people. They found that only switching to plant-based diets and train-based holidays can reduce emissions by 40%.
Policy-makers would do well to pay attention to this if they want to get serious in the fight against global warming.
1. What do single men and single women have in common?| A．They take public transportation. | B．They choose carbon-intensive foods. |
| C．They spend money on the same things. | D．They are concerned about climate change. |
| A．Men seldom show interest in dairy products. |
| B．Single men and women are different in energy use. |
| C．The gender differences had existed for such a long time. |
| D．Lack of findings in gender differences in climate change. |
| A．Gender differences have long existed. | B．Global warming is getting much worse. |
| C．Reducing carbon emission is not so difficult. | D．Consumption habits vary from person to person. |
| A．The measures to reduce carbon emissions. |
| B．The new data about greenhouse gas emissions. |
| C．The consuming differences between single men and women. |
| D．The link between consumption habits and carbon footprints. |
