1 . In the old days, when you had to drive to a movie theater or to a video store to get some entertainment, it was easy to see how your actions could have an impact on the environment. You were hopping into your car, driving across town, and using gas all the way.
But now that we’re used to staying at home and streaming movies, we might feel better about ourselves. After all, we’re just picking up our phones or maybe turning on the TV. You’re welcome, Mother Nature.
“Not so fast,” says a recent report from the French-based Shift Project. Watching a half-hour show would lead to 3.5 pounds of CO₂ emissions. That’s like driving 3.9 miles. According to “Climate Crisis: The Unsustainable Use of Online Video,” digital technologies are responsible for 4% of greenhouse gas emissions, and that energy use is increasing by 9% a year. Stored in data centers, videos are transferred to our terminals such as computers, smart phones, etc. via networks: all these processes require electricity whose production consumes resources and usually involves CO₂ emissions.
In the European Union, the Eureca project lead scientist, Rabih Bashroush, calculated that 5 billion downloads and streams of the song “Despacito” consumed as much electricity as the countries of Chad, Guinea-Bissau, Somalia, Sierra Leone and the Central African Republic used in a single year.
Streaming is only expected to increase as we become more attached to our devices. Online video use is expected to account for 80% of all internet traffic in five years according to CISCO. By then, about 60% of the world’s population will be online.
You’re probubly not going to give up your streaming services, but there are things you can do to help lessen the impact of your online use.
Here are some tips:
Disable autoplay for video on social media.
Stream over Wi-Fi, not mobile networks.
Watch on the smallest screen you can.
Don’t use high-definition (高清) video on devices.
1. It can be inferred from Paragraph 2 that people think ______.| A．they should welcome Mother Nature |
| B．streaming at home avoids possible emissions |
| C．it is inconvenient to drive to a movie theater |
| D．watching movies at home is more fun |
| A．60% of the world’s population watch videos online |
| B．digital technologies account for 4% of electricity use |
| C．online video use makes up 80% of all internet traffic |
| D．30 minutes of streaming video may produce 3.5 pounds of CO₂ |
| A．To praise their energy-efficient practice. |
| B．To prove the poverty of the five countries |
| C．To stress the popularity of the song “Despacito” |
| D．To show the high energy use of downloads and streams |
| A．Use high-definition videos. | B．Turn off video autoplay |
| C．Stream over mobile networks. | D．Watch movies on bigger screens. |
2 . For most of human history, the stars shone brightly in a dark night sky. But today, cities and towns, increasingly lit by artificial light at night, dramatically reduce the visibility of stars.
Satellite data suggests that light pollution has been increasing in many parts of the world over the last decade. However, satellites miss the blue light of LEDs (发光的二极管), which are commonly used for outdoor lighting, resulting in an underestimate of light pollution.
An international citizen science project called Globe at Night (环球夜景) aims to measure how everyday people’s view of the sky is changing. The data shows that the night sky got, on average, 9.6% brighter every year. For many people, the night sky today is twice as bright as it was eight years ago. The brighter the sky, the fewer stars you can see. If this trend continues, a child born today in a place where 250 stars are visible now would only be able to see 100 stars on his/her 18th birthday.
The main factors leading to increasing brightness of the night sky are industrialization and the growing use of LEDs for outdoor lighting. The loss of dark skies threatens our ability as astronomers to do good science. But everyday people feel this loss too. Starry night skies have inspired artists, writers, musicians and philosophers for thousands of years. Light pollution also has a bad effect on the daily cycle of light and dark that plants and animals use to adjust their lifestyle. Two-thirds of the world’s key biodiversity (生物多样性) areas are affected by light pollution.
Individuals and their communities can make simple changes to reduce light pollution. The secret is using the right amount of light, in the right place and at the right time. Making outdoor lights shine downward, using lights that give out more yellow-colored light instead of white light and putting on light timers can all help reduce light pollution. A view of about 2,500 stars in a truly dark sky might convince you that dark skies are a resource worth saving.
1. How is the first paragraph mainly developed?| A．By giving an example. | B．By making a comparison. |
| C．By reaching a conclusion. | D．By raising a question. |
| A．The light pollution is getting more serious. |
| B．The night sky today gets darker than before. |
| C．It’s difficult to imagine a child’s fast growth. |
| D．LEDs are commonly used for outdoor lighting. |
| A．The bad effects of light pollution. | B．The factors causing light pollution. |
| C．The functions of starry night skies. | D．Key biodiversity areas in the world. |
| A．To explain a phenomenon. | B．To suggest a solution. |
| C．To remember a scientist. | D．To increase public awareness. |
Air pollution has largely gone under-reported by the media, yet despite
Then how can we measure and end such a problem? The answer is
Just as noise pollution negatively impacts human health, it also affects wildlife. It can affect animal communication, their abilities to find food and impact where they live. A recent study published in Biology Letters found that human-created noise is affecting a wide range of animals. Noise pollution is caused by cars, trucks, airplanes, ships, factories, industrial activities and sounds from cities, among others. Researchers found that wildlife in many different land and water ecosystems showed significant responses to human-created noise.
For example, bats use ultrasonic sound waves to get around and to find food. However, noise pollution affects this and causes them to spend more time and energy locating their food source. Shipping lanes in the UK can be deafening to harbor seals, and noises from ships are seriously impacting killer whales ability to find food and avoid potential dangers, according to episode 2 of CBC s Killers: J pod on the brink (边缘). And it’s no secret that many human-created conditions, like noise, are changing the behavior of birds. You may be surprised to learn that plants are also impacted, since pollinators (传粉昆虫) often relocate to quieter areas.
Not unlike the impact of light pollution on insects, noise pollution is causing change. It can change the types of species living in many different ecosystems, which in turn impacts the functions of these areas, according to The Guardian.
The good news is that if noise is reduced or simply turned off, it more or less removes the issue. The impact does not remain in the same way as other forms of pollution, like plastic or chemicals. And efforts are already underway in Canada.
BC Ferries is working to lessen the effects of underwater noise, especially along ferry routes that pass through critical habitats. WCS (Wildlife Conservation Society) Canada is encouraging the federal government to increase protective measures in the Arctic. They’re also working with international colleagues to address the increase of noise in the region as a result of new shipping routes.
While these initiatives demonstrate progress, tightening rules and regulations around noise pollution is an important measure for conserving wildlife in Canada.
1. Why do bats spend more time looking for food?2. What is the influence of noise pollution on ecosystems?
3. Please decide which part is false in the following statement, then underline it and explain why.
Noise pollution affects animals in many ways, and compared with other forms of pollution, noise pollution is harder to deal with.
4. Please give some advice on how to reduce the effects of noise pollution on animals. (In about 40 words)
5 . Sleeping in a noisy room isn’t only distracting (使人分心的), and it can also harm your health. Although researchers have known for decades that longterm loud noises can harm us, it’s only recently become recognized as a widespread problem.
In a new review of previously published studies, researchers from Germany and Denmark took a look at the ways in which noises, such as an airplane passing by or jackhammer digging in the ground, can affect our hearts. Perhaps the most obvious impact of a loud sound while you are sleeping is that it can wake you up. But, even if you don't remember hearing the noise or you don’t physically get out of bed, it can disrupt you in ways you may not realize.
“Noise is not just causing annoyance, but it actually makes us sick,” said Dr. Thomas Münzel, a professor at Johannes Gutenberg University Mainz. “Regardless of where the sound is coming from, if it gets louder than 60 decibels (分贝),it can increase the risk of heart disease.”
When our body hears these noises, it reacts with a stress reaction. In this case, these sudden and unexpected noises cause hormones(荷尔蒙) to speed up and eventually damage the heart. Although the chance that a single noise will affect you is unlikely, it’s the continuous exposure (接触) to the sound that can finally affect you.
“But our heart health isn’t the only cause for concern. Long-term noise may also raise the risk of type 2 diabetes (糖尿病), depression, and anxiety disorders,” he warns. In the future, Münzel plans to examine how noises from cars, planes, and other vehicles affect the brain. But despite the amount or the depth of research he conducts, it’ll take the help of politicians to improve the effect of noise on our health.
“Politicians have to take into account, in particular, the new findings,” Münzel said, “As for aircraft noise and airports, it is important to make new laws and set new lower noise limits that protect people living close by the airport instead of the owners of the airport.”
1. What do researchers from Germany and Denmark find?| A．Noise does little harm to people who are asleep. |
| B．Noise can cause people’s memory to get worse sharply. |
| C．Noise has been a widespread concern for a long time. |
| D．Noise louder than 60 decibels may cause heart disease. |
| A．Defeat. | B．Harm. | C．Attract. | D．Discourage. |
| A．Politicians should take action to handle noise pollution. |
| B．Münzel will continue other studies on brain diseases. |
| C．Benefits of airport owners are more important than health. |
| D．Attention should be paid to heart health and other diseases. |
| A．Who Is to Blame for Noise Pollution | B．What Should Be Done to Stop Noise |
| C．How Münzel Carried Out His Research | D．How Noise Pollution Harms Our Body |
Since Japan began releasing nuclear-contaminated (核污染的) wastewater into the Pacific Ocean last Thursday despite strong opposition and
Experts say that the influence of Japan’s release of wastewater
Some even say that they will expect
7 . As newer, more advanced technologies come out, huge amounts of electronics (电子产品) are thrown away, instead of being reused. These goods often end up in landfills, where the chemicals inside them may be a danger to the environment. Electronics can contain harmful materials. If these materials get into the ground or water, the pollution can cause serious problems. Most electronics require metals. These metals must be mined from the Earth. Often the mining process creates serious pollution.
A group known as Waste Electrical and Electronic Equipment (WEEE) Forum is trying to make people more aware of the problems of e-waste. Recently, the WEEE Forum asked researchers from the United Nations (UN) to study a kind of e-waste that’s often not noticed because people don’t consider the goods to be electronics. The WEEE Forum calls this kind “unable-to-be-seen” e-waste.
The UN study shows that about 1/6 of all e-waste is “unable-to-be-seen”. Though it’s “unable-to-be-seen”, it’s certainly not a small amount. The “unable-to-be-seen” e-waste weighs about 9 billion kilograms. The WEEE Forum says that if this e-waste were put into 40-ton trucks and the trucks were then lined up, the line of trucks would be about 5,630 kilometers long.
The surprising kind leading the “unable-to-be-seen” e-waste group was toys. Worldwide, roughly 7.3 billion electronic toys are thrown away each year. These include goods like car racing sets, electric trains, and musical toys. They also include toys with electronic parts, like dolls that speak or games with electronic timers. In all, toys make up about 35% of “unable-to-be-seen” e-waste. But the problem is far larger than just toys. The report also shows that other everyday goods like home alarms, smoke alarms, power tools, and computer cables (电缆) are also big sources of “unable-to-be-seen” e-waste.
The WEEE Forum is hoping that as more people and governments become aware of e-waste, they will make a much greater effort to make sure electronics get reused.
1. What is paragraph 1 mainly about?| A．The amount of electronics. | B．The development of electronics. |
| C．The ways of reusing electronics. | D．The pollution of electronics. |
| A．People’s interest in electronics’ character. |
| B．People’s impression on electronics’ package. |
| C．People’s misunderstanding of electronics. |
| D．People’s struggle to adapt to electronics. |
| A．By showing numbers. | B．By providing examples. |
| C．By making a summary. | D．By making a comparison, |
| A．Designing advanced electronics. | B．Making electronics get reused. |
| C．Stopping giving away electronics. | D．Reducing electronics’ production. |
8 . Have you ever found that you were able to sleep better with an air conditioner or fan running or perhaps with the sound of rain falling outside? If so, then you’re already familiar with white noise.
White noise refers to a noise that has a mixture of all the audible (听得见的) frequencies that the human ear can detect. It is a combination of all the frequencies of sound played at once. It can cover the sounds of other noises because of its various frequencies, leading many people to experience its calming effects.
Researchers have studied the effect of white noise on humans for many years, finding evidence it can reduce crying in infants and improve work performance. Many studies have also examined how white noise may affect human sleep. They found that listening to white noise positively affects sleep. For example, people living in a high-noise area of New York City fell asleep faster and spent more of their time in bed asleep while listening to white noise. In another study, listening to white noise through headphones improved sleep quality for seriously ill patients in a loud hospital room.
However, a recent analysis of multiple studies looking at white noise’s effect on sleep has produced mixed results. The researchers are doubtful about the quality of existing evidence and conclude that further research is necessary in order to widely recommend white noise as a sleep aid. They also note that in some instances, white noise can perturb a person and may affect their hearing.
Despite that, researchers are still optimistic that the steady white noise might reduce a sleeper’s sensitivity to unpredictable noises from the environment, such as transportation sounds like cars and planes, which are considered a major contributor to poor sleep.
1. Why does white noise have calming effects?| A．Because it can absorb other noises. | B．Because it can help people sleep better. |
| C．Because it can be detected by human ears. | D．Because it can cover the sounds of other noises. |
| A．By giving examples. | B．By telling stories. |
| C．By asking questions. | D．By making comparisons. |
| A．Amuse. | B．Calm. | C．Disturb. | D．Warn. |
| A．White noise should be strongly recommended as a sleep aid. |
| B．Harmful effects of white noise have become a major concern. |
| C．Poor sleep will make people sensitive to the unpredictable noises. |
| D．More researches are needed to confirm the effect of white noise on sleep. |
9 . Carried by the wind, dust particles (微粒) from places such as the Sahara Desert can float halfway around the world before settling to the ground. As the plastics abandoned by humans break down into tiny pieces in the environment, they, too, travel through the atmosphere. Now scientists are a step closer to understanding how these microplastics travel in the globe — both locally and on long-distance flights.
Researchers spent more than a year collecting microplastics from 11 national parks and wilderness areas in the western U.S. They examined the particles that settled on dry days and those that fell along with rain or snow. In addition to making clear how microplastics move around, the results, published on Thursday in Science, reveal the seriousness of the problem: more than 1 million kilograms of microplastics — the weight of 120 million to 300 million plastic water bottles — fall on protected lands in the country’s western region each year.
The new findings add to scientists’ concern over microplastic pollution’s potential impacts on the environment and human health. “We’re not supposed to breathe in this material,” says Steve Allen, a microplastics researcher at the University of Strathclyde in Scotland, who was not involved in the new study. “Plastics in the environment “carry all sorts of pesticides (农药), heavy metals and all the other chemicals that we’ve made over time,” he adds. “They’re going to carry them directly into our lungs.”
Since their discovery in oceans in the 1970s, microplastics — which can be as large as a grain of rice or smaller than a particle of dust — have been found nearly everywhere researchers have looked: in cities, in Arctic snow, on remote mountaintops. Their presence in areas distant from the place where human live has pointed to them being carried by winds.
1. What do the scientists further understand now?| A．Why Sahara Desert is expanding to the south of Africa. |
| B．How plastic particles travel on the wind. |
| C．Why it is hard for plastics to break down. |
| D．How dust particles are spreading through the wind. |
| A．The results showed the amount of microplastics is huge. |
| B．Researchers collected microplastics across the U.S. |
| C．Researchers focused on plastic particles in dry days. |
| D．Numerous plastic water bottles were found each year. |
| A．They should be recycled. | B．They do harm to weather. |
| C．They can be used to make all sorts of pesticides. | D．They carry harmful chemicals to human lungs. |
| A．Dust Particles Is Harmful to Our Lungs | B．The Environment Is Threatened by Plastics |
| C．Microplastics Are Falling from the Sky | D．Microplastics Do Harm to Health |
10 . Global light pollution has increased by at least 49% over 25 years, new research shows. This data (数据) only includes light which can be seen through satellites, and scientists think the true increase may be significantly higher — up to 270% globally, and 400% in some areas.
This study shows not only of how bad light pollution has become as a problem of the whole world, but also that it is continuing to get worse, probably at a faster and faster rate.
The study highlights the “hidden impact (影响)” of the LED technology. LEDs send out more blue light than previous lamp technology, but satellite sensors can’t discover this blue light and so underestimate (低估) the level of emissions (排放物). The authors say the actual increase in the power sent out by outdoor lighting, and thus of light pollution, may be as high as 270%. “To take the UK as an example, if you pay no attention to the effect of the change to LEDs, you get the false impression that light pollution has recently weakened,” said researcher Dr Sanchez de Miguel. “However, it has really increased, very remarkably.”
Contrary to popular belief, the LED streetlights, while potentially providing some energy savings, has increased light pollution and also the impacts on flying insects (昆虫).
Ruskin Hartley, Executive Director of the International Dark-Sky Association, said, “Over the past 25 years, the use of LED lighting has been accompanied by rapid increases in light pollution all over the world.”
If no action is taken to change this trend (趋势), the impact on the natural environment will speed up, further worsening the biodiversity (生物多样性) crisis and wasting energy. Many studies have now shown that light pollution, from streetlights and other sources, can have major impacts on the natural environment. Such pollution is likely to have played a role in the huge decrease in insect populations.
1. How does the author illustrate that light pollution becomes worse?| A．By referring to certain theories. |
| B．By providing comparative data. |
| C．By listing a lot of opinions. |
| D．By giving some examples. |
| A．Emission levels of LEDs are low. |
| B．Satellite sensors are blind to LEDs. |
| C．Outdoor lighting is limited in the UK. |
| D．LEDs are less and less used in the UK. |
| A．They are good for insects. | B．They save lots of energy. |
| C．They cause light pollution. | D．They are environment-friendly. |
| A．The harm of light pollution. |
| B．The causes of biological crises. |
| C．The trend of insect populations. |
| D．The importance of the natural environment. |
