In the past 50 years,the amount of water in the open ocean with zero oxygen has gone up more than fourfold.In coastal water bodies,including river mouths and seas,low-oxygen sites have increased more than tenfold since 1950.Scientists expect oxygen to continue dropping even outside these zones as Earth warms.
“Oxygen is fundamental to life in the Oceans,” said Denise Breitburg,a marine ecologist with the Smithsonian Environmental Research Centre.“The decline in ocean oxygen ranks among the most serious effects of human activities on the Earth’s environment.Actually,it’s a great loss to all the support services that rely on recreation and tourism,including hotels and restaurants and taxi drivers and everything else.The reverberations(严重影响) of unhealthy ecosystems in the ocean can be extensive.”
In areas traditionally called “dead zones”,like those in Chesapeake Bay and the Gulf of Mexico,oxygen plummets(大幅下跌) to so low levels that many animals die.As fish avoid these zones,their habitats become smaller and they’re easier to be attacked or caught.But the problem goes far beyond “dead zones”.Even smaller oxygen decline can prevent growth in animals,hinder reproduction and lead to disease or even death.It can also cause the release of dangerous chemicals such as nitrous oxide,a greenhouse gas up to 300 times more powerful than carbon dioxide.While some animals can boom in “dead zones”,overall biodiversity falls.
Climate change is the key criminal in the open ocean.Warming surface waters make it harder for oxygen to reach the inside of the ocean.Furthermore,as the ocean as a whole gets warmer,it holds less oxygen.In coastal waters,too much nutrient pollution from land creates algal blooms,which use up oxygen as they die and break down.
People’s livelihoods are also on the line,the scientists reported,especially in developing nations.Smaller fisheries(渔场) may be unable to relocate when low oxygen destroys their harvests or forces fish to move elsewhere.So we humans have to carry on a war now and win the war.
1. What does the first paragraph mainly talk about?A.The ocean has been losing its oxygen. |
B.The amount of sea water is increasing. |
C.The coastal water bodies are dangerous. |
D.Earth becomes warmer and warmer. |
A.Different oceans have different levels of oxygen. |
B.The decline in ocean oxygen has great influences. |
C.The future of tourism relies on the levels of ocean oxygen. |
D.The decrease in ocean oxygen is the most serious environmental problem. |
A.It offers more food. |
B.It forms dangerous gas. |
C.It reduces their living areas. |
D.It produces more carbon dioxide. |
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【推荐1】There has been a very serious decline in the numbers of shallow-water fish as a result of overfishing. People still want to eat fish, so the fishing industry must look at other sources, especially the deep waters of the Atlantic.
Conservation measures will have to be put in place if these deep-sea fish are to survive. Research on five such species shows that numbers have declined by between 87 percent and 98 percent.
The problem is emphasised by the fact that the decline in numbers happened in less than twenty years. Deep-sea fish take a long time to reproduce and normally live for many years.
None of these facts has been taken into account by the fishing industry. The deep-sea species have been caught as if they were the fast-breeding fish like sardine and herring.
The damage done by overfishing goes beyond the sea environment. Millions of people make a living in the fishing industry.
A.Billions of people rely on fish for protein. |
B.Many people now choose not to eat deep-sea fish. |
C.Unfortunately, their reproduction rate is very low. |
D.This puts them in the category of “critically endangered”. |
E.Overfishing is a major cause of decline in populations of ocean wildlife. |
F.It is like killing elephants as if they reproduced at the same rate as rabbits. |
G.This has resulted in a sharp decline in the numbers of many of the species caught. |
【推荐2】If the three Rs (reduce, reuse and recycle) is a guideline to save the planet, garbage-sorting is where the efforts start. Since May 1, Beijing has started to carry out mandatory garbage-sorting in new efforts to better protect the environment. Under the new regulation, residents are required to classify household waste into four categories: kitchen, recyclable, hazardous and other waste. People who fail to sort their garbage properly can be fined from 50 to 200 yuan, reported Xinhua.
Some residential communities in Beijing have introduced rewards to encourage residents to sort their garbage. According to Xinhua, residents can earn points by classifying their domestic waste correctly and then exchange the points they accumulate for daily necessities such as soap.
Garbage sorting practices have reached over 70 percent of housing estates in 18 cities, including Shanghai, Xiamen and Hangzhou, according to the Ministry of Housing and Urban-Rural Development. Shanghai first enacted a mandatory garbage-sorting regulation in July 2019 and has had a 90 percent compliance (服从) rate among its housing estates.
According to a report by the Ministry of Ecology and Environment, over 90 percent of the public believe that garbage-sorting is important for the protection of the environment. However, garbage-sorting is still a big problem in China. Only 30 percent of participants said they think they are completely sorting their waste, the report noted. According to Xinhua, it’s partly because many people lack the willingness to sort their own waste. Also, some previous garbage regulations didn’t include fines for people who failed to obey them.
“It’s a must to have a legal guarantee to promote garbage sorting,” Liu Jianguo, a professor from Tsinghua University, told China Daily, “Aside from China, many countries like Germany, Spain and Britain, also ask people to sort waste into specific categories. In Japan, there is a fixed time for the sorting of each kind of garbage and littering.”
1. What can we learn about the new regulation in Beijing?A.It hasn’t been put into use yet. |
B.Residents can sort the garbage as they like. |
C.People can get money if they classify their domestic waste correctly. |
D.Those who can’t sort the garbage as the new rule requires shall be fined. |
A.Most people are unaware of its importance in protecting environment. |
B.Some people don’t want to take the trouble to sort the garbage. |
C.Only residents in big cities can sort the trash correctly. |
D.The government doesn’t have enough money to support garbage sorting. |
A.It’s difficult to carry out garbage sorting in China. |
B.Some laws in garbage-sorting are needed. |
C.People in developed countries can better sort the garbage. |
D.We should learn from Japan. |
A.Garbage sorting, a new start in China | B.New regulations in Beijing |
C.Argument on garbage sorting | D.How to sort domestic garbage |
【推荐3】According to the Solar Energy Industry Association, the number of solar panels installed(安装)has grown rapidly in the past decade, and it has to grow even faster to meet climate goals. But all of that growth will take up a lot of space, and though more and more people accept the concept of solar energy, few like large solar panels to be installed near them.
Solar developers want to put up panels as quickly and cheaply as possible, so they haven’t given much thought to what they put under them. Often, they’ll end up filling the area with small stones and using chemicals to control weeds. The result is that many communities, especially in farming regions, see solar farms as destroyers of the soil.
“Solar projects need to be good neighbors,” says Jordan Macknick, the head of the Innovative Site Preparation and Impact Reductions on the Environment(InSPIRE)project. “They need to be protectors of the land and contribute to the agricultural economy.” InSPIRE is investigating practical approaches to “low-impact” solar development, which focuses on establishing and operating solar farms in a way that is kinder to the land. One of the easiest low-impact solar strategies is providing habitat for pollinators(传粉昆虫).
Habitat loss, pesticide use, and climate change have caused dramatic declines in pollinator populations over the past couple of decades, which has damaged the U.S. agricultural economy. Over 28 states have passed laws related to pollinator habitat protection and pesticide use. Conservation organizations put out pollinator-friendliness guidelines for home gardens, businesses, schools, cities—and now there are guidelines for solar farms.
Over the past few years, many solar farm developers have transformed the space under their solar panels into a shelter for various kinds of pollinators, resulting in soil improvement and carbon reduction. “These pollinator-friendly solar farms can have a valuable impact on everything that’s going on in the landscape,” says Macknick.
1. What do solar developers often ignore?A.The decline in the demand for solar energy. |
B.The negative impact of installing solar panels. |
C.The rising labor cost of building solar farms. |
D.The most recent advances in solar technology. |
A.Improve the productivity of local farms. |
B.Invent new methods for controlling weeds. |
C.Make solar projects environmentally friendly. |
D.Promote the use of solar energy in rural areas. |
A.To conserve pollinators. | B.To restrict solar development. |
C.To diversify the economy. | D.To ensure the supply of energy. |
A.Pollinators: To Leave or to Stay | B.Solar Energy: Hope for the Future |
C.InSPIRE: A Leader in Agriculture | D.Solar Farms: A New Development |
【推荐1】A new report links eating eggs to an increased risk of heart disease. The results follow several earlier studies that found eating eggs was generally healthy. The new report combines data from six other earlier studies. It shows a 6 percent increased risk of heart disease when the average number of eggs a person eats each day increased by half an egg.
In the United States, eggs are generally one of the top sources of cholesterol (胆固醇) in a person’s diet. Individuals with higher levels of cholesterol in their diets are at increased risk for the development of heart disease later in life. The team examined data gathered from six studies that involved a total of 29,615 people. Earlier researchers had followed these people for an average of 17.5 years. At the start, the participants answered questions about the foods they ate. But they were not asked about their diets at any time after that.
Over time, there were 5,400 heart-related incidents among the group. This included 2,088 deadly and non-deadly heart disease events and 1,302 deadly and non-deadly stroke events. It also included 1,897 deadly and non-deadly heart failure events and 113 other deaths from cardiovascular (心血管的) disease.
After examining the data, Allen’s team found a link between egg consumption as reported at the start of the study and people’s risk of developing heart disease. As their egg consumption rose, so did their risk.
Eggs contain a lot of cholesterol—about 200 milligrams. That is the highest daily amount recommended under current guidelines. Less than one egg a day on average is acceptable from a nutritional standpoint. The study is observational, meaning it can only show there is a link between egg consumption and heart disease. But it cannot prove eggs are the cause of the disease. It may just be that people eating a lot of eggs are also consuming a lot of bacon.
1. What were the participants asked about at the start of the study?A.Their birthplaces. | B.Their diets. |
C.Their physical conditions. | D.Their ages. |
A.The number of deaths from heart disease. |
B.The number of treatments for heart disease. |
C.The number of different causes of heart disease. |
D.The number of heart disease cases among the participants. |
A.Eggs are good for everyone. |
B.Eggs are the cause of heart disease. |
C.Eating eggs with limits is beneficial. |
D.Eating eggs has nothing to do with heart disease. |
A.Eggs Have Great Nutritional Value |
B.Eggs Will Disappear from People’s Diet |
C.It Is Much Better to Increase Egg Consumption |
D.Diet Containing Eggs May Be Linked to Heart Disease |
【推荐2】Shortly before Christmas last year, one of Brazilian pianists Joao Carlos Martins invited his friends to a bar near his home. He wanted to show them the best gift he had received: a new pair of gloves. They are not just any gloves, however. The special bionic devices let the 79-year-old pianist play with both hands for the first time in more than 20 years.
By his retirement last March, Martins had received 24 medical operations to try to reduce pain caused by a disease and from a series of accidents. Before the gloves, which were especially developed for him, Martins could only play songs slowly with his thumbs and, sometimes, his pointer fingers.
However, one designer believed Martins’ retirement had come too early. The designer, Ubirata Bizarro Costa, created special bionic gloves for Martins’ hands. The gloves help move his fingers up after they press on the piano keys. Costa said he created early models based on images of Martins’ hands, but he said those models were not good. He then decided to tell Martins about his work. Costa and Martins then spent several months testing different models. Finally, the perfect model came in December, and cost only $125.
These days, Martins never takes off his new gloves, even when he goes to sleep. Martins said, “I have received more than 100 devices in the last 50 years. None of those devices worked well or long enough, but these gloves do. ”
The new gloves have given Martins a new goal. He hopes to play the piano at New York’s Carnegie Hall in October. He is already set to conduct a concert celebrating the 60th anniversary of his first appearance there.
1. What can we know about Joao Carlos Martins?A.He enjoys playing the piano in a bar. | B.He has received the best gift in his life. |
C.He has just retired from a music company. | D.He often discusses with his friends about music. |
A.A failed operation. | B.His friend's death. |
C.The new pair of gloves. | D.A disease and some accidents. |
A.By testing different models. | B.By pressing Martins’ fingers. |
C.By examining Martins’ hands. | D.By working with other companies. |
A.They are useless. | B.They are strange. |
C.They are satisfying. | D.They are frightening. |
【推荐3】Power often boosts an employee’s creativity because being powerful liberates the individual from restrictions. However, new research shows that employees who are not in positions of power can become more creative when given time to “warm up” to a task by engaging in the creative task more than once.
“This is important because when people with more power are able to express their creative ideas more than those with less power, which leads to a rich-get-richer dynamic that strengthens these power imbalances.” said Brian Lucas, assistant professor in the Cornell University. “Understanding ways to boost the creativity of lower power workers can help them find the right way to deal with this low-power disadvantage,” Lucas said.
Lucas and his colleagues conducted two studies to reach their conclusion. In the first study, they divided the creative idea generation session into two rounds consisting of a one-minute “warm up” followed by a second round in which the participants could take as long as they wanted. Participants were randomly assigned to a high-power condition or a low-power condition, and feelings of power were generated with a role manipulation (操纵) where participants were given a leadership role and control over resources (high power) or an employee role with no control over resources (low power). The study found that high-power individuals were more creative than low-power individuals in the warm-up round. There was no difference, though, in creativity in the second round.
In the second study, the researchers gave them a different creative task and increased the number of rounds from two sessions to five, taking as long as they like to complete the task. Similar to the first study, the study found that high-power individuals were more creative than low-power individuals in the first round. But the creativity of low-power individuals caught up to the creativity of the high-power individuals after the first round.
“The low-power warm-up effect suggests a simple intervention that empowers all employees to tap their creative potential and overcomes power imbalances in the workplace: when pursuing creative work. let employees warm up first,” Lucas said.
1. Why is it important to boost lower-power workers’ creativity according to Lucas?A.It stimulates power balances. |
B.It motivates their ambition to catch up. |
C.It encourages a harmonious workplace. |
D.It creates a competitive work environment. |
A.By competing with leaders. |
B.By receiving different positions. |
C.By working in different working conditions. |
D.By finishing a creative task with time limits. |
A.It had more rounds. |
B.More participants were involved. |
C.Participants had a more complicated task. |
D.Participants’ creativity gap became wider. |
A.Power tends to encourage creative ideas. |
B.Changing tasks boosts all the employees’ creativity. |
C.Warm-up time corrects creativity power imbalances. |
D.Low-power individuals outperform the high-power ones. |