1 . Breathing dirty air can cost someone’s lifespan (寿命) months—even years, a new study finds. Worldwide, air pollution lowers average lifespans by a year. Scientists shared their new findings in Environmental Science & Technology Letters.
Air pollution (污染) has been linked to many health problems. Most earlier studies have looked at how tiny air pollutants affected rates of illness or death. But now an environmental scientist, Joshua Apte, is going even further. He works at the University of Texas, Austin. He together with his team is looking at life expectancy, hoping to make the threat easier to understand.
PM 2.5 is what scientists call tiny particles of pollution in the air. Higher levels of PM2.5 can cause health problems and cut months, if not years, from the average lifespan. This analysis shows pollution affects life expectancy in different parts of the world.
The World Health Organization (WHO) recommends limiting PM 2.5 to 10 micrograms (微克) per cubic (立方) meter of air. Apte’s group used data to try to find how this low level would help people. But meeting the WHO standard won’t get rid of health damage from dirty air. That’s because even below 10 micrograms per cubic meter pollution still causes huge risks.
Reducing air pollution could increase life expectancy. The scientists also compared how other threats shorten life spans across the globe. These risk factors included smoking and cancer.
These results show that in poor countries, cleaning up dirty air could greatly increase lifespans. It could have as big an effect as cleaning up drinking water, or curing lung cancer. However, in wealthier countries air pollution shortens life expectancy by less than half a year. All forms of cancer, in fact, shorten the average life expectancy by more than 3.5 years. “Knowing this can really help people or policymakers, decide where to spend their money.” says Kirk Smith.
1. Why is Joshua Apte’s team carrying out the study?A.Know how small air pollutants are. |
B.Study many different healthy problems. |
C.Study the life expectancy of different people. |
D.Let people understand air pollution better. |
A.Its air is very clean. |
B.It will get a prize from WHO. |
C.It still has pollution risks. |
D.Its people will live a healthy life. |
A.The study will help different countries or people take different policies. |
B.Lung cancer is the leading killer in all kinds of cancers. |
C.Reducing air pollution can increase all people’s lifespans much. |
D.It’s very hard to clean up dirty air in a short time. |
A.Many Factors are Affecting People’s Health |
B.Air Pollution is Shortening Lives Worldwide |
C.Governments are Trying to Make Lifespan Long |
D.The Effect of Cancer is Worse than Dirty Air |
2 . What is the Great Pacific Garbage Patch?
The Great Pacific Garbage Patch (GPGP) is the largest of the five offshore plastic accumulation zones in the world’s oceans. It is located halfway between Hawaii and California.
PLASTIC
It is estimated that 1.15 to 2.41 million tonnes of plastic are entering the ocean each year from rivers. More than half of this plastic is less
The strong and floating plastics show resiliency(韧性) in the marine environment, allowing them to be transported over
Once these plastics enter the gyre(环流), they are unlikely to leave the area until they
LOCATION
Due to seasonal and interannual variabilities of winds and currents, the GPGP’s location and shape are constantly changing. Only floating objects that are
By simulating concentration levels in the North Pacific, the researchers were able to follow the location of the patch and found on average it orbits around 32°N and 145°W. However, the team observed seasonal
IMPACT ON WILDLIFE
Plastic has increasingly become a very common substance in the ocean. Due to its size and color, animals
Studies have shown that about 700 species have encountered marine debris, and 92% of these
IMPACT ON HUMANS AND SOCIETY
Once plastic enters the marine food web, there is a possibility that it will contaminate the human food chain as well. Through a process called bioaccumulation, chemicals in plastics will enter the body of the animal
A.ACCUMULATION | B.DRIFT | C.FLOATING | D.PROMOTION |
A.light | B.thick | C.tiny | D.dense |
A.adjusted | B.overdone | C.deposited | D.extended |
A.upgrade | B.degrade | C.assemble | D.disassemble |
A.transportation | B.estimation | C.concentration | D.location |
A.predominantly | B.rarely | C.previously | D.slightly |
A.similarity | B.shift | C.boost | D.figure |
A.exchange | B.substitute | C.leave | D.confuse |
A.implications | B.interactions | C.interferences | D.influences |
A.resting | B.feeding | C.risking | D.waiting |
A.mariner | B.prey | C.tracker | D.predator |
A.present | B.absent | C.current | D.reliable |
A.Likewise | B.However | C.Moreover | D.Therefore |
A.result in | B.remove from | C.stem from | D.bring about |
A.insufficient | B.adequate | C.insignificant | D.substantial |
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1. Why does the speaker think our world is becoming much smaller?
A.People are using modern traffic and communication means. |
B.The earth is being polluted day and night. |
C.The population on the earth is growing too fast. |
A.Water pollution. | B.Noise pollution. | C.Air pollution. |
A.It makes us become angry more easily. |
B.It makes people sleepless. |
C.It is bad for all living things in the world. |
A.Many countries are making rules to fight against pollution. |
B.The pollution of the earth doesn’t grow as fast as the world population does. |
C.Water pollution is more serious than noise pollution. |
5 . Microplastic pollution has been detected in human blood for the first time, with scientists finding the tiny particles(微粒) in almost 80% of the people tested. The discovery shows the particles can travel around the body and may live in organs.
The impact on health is as yet unknown. But researchers are concerned as microplastics cause damage to human cells in the laboratory and air pollution particles are already known to enter the body and cause millions of early deaths a year.
Huge amounts of plastic waste are left in the environment and microplastics now pollute the entire planet, from the top of Mount Everest to the deepest oceans. People were already known to consume the tiny particles via food and water as well as breathing them in, and they have been found in the faeces (排泄物) of babies and adults.
The scientists analysed blood samples from 22 healthy adults and found plastic particles in 17. Half the samples contained PET plastic, which is commonly used in drinks bottles, while a third contained polystyrene, used for packaging food and other products. A quarter of the blood samples contained polyethylene, from which plastic carrier bags are made.
“Our study is the first indication that we have polymer particles(聚合物颗粒) in our blood — it’s a breakthrough result,” said Prof Dick Vethaak, an expert at Vrije Universiteit Amsterdam in the Netherlands. “But we have to extend the research and increase the sample sizes, the number of polymers assessed, etc.” Further studies by a number of groups are already under way, he said.
“It is certainly reasonable to be concerned,” Vethaak said. “The particles are there and are transported throughout the body.” He said previous work had shown that microplastics were 10 times higher in the faeces of babies compared with adults and that babies fed with
plastic bottles are taking millions of microplastic particles a day.
Vethaak acknowledged that the amount and type of plastic varied considerably between the blood samples. “But this is a pioneering study,” he said, with more work now needed. He said the differences might reflect short-term exposure before the blood samples were taken, such as drinking from a plastic-lined coffee cup, or wearing a plastic face mask.
“The big question is what is happening in our body?” Vethaak said. “Are the particles retained in the body? Are they transported to certain organs, such as getting past the blood-brain barrier? And are these levels sufficiently high to cause disease? We urgently need to fund further research so we can find out.”
1. What could be inferred from Paragraph 2?A.Air Pollution particles can cause death eventually. |
B.Microplastics can be deadly to humans. |
C.There is no evidence that microplastics harm human cells. |
D.Microplastics can travel throughout body and damage organs. |
A.They are found in most people. |
B.Polyethylene found in blood samples might be taken from drinks bottles. |
C.A quarter of the blood samples contained PET particles. |
D.Half of the microplastics in the blood samples were likely introduced by drinking from plastic containers. |
A.Doubtful. | B.Negative. | C.Excited. | D.Depressed. |
A.we are the pioneers in the field of plastic research |
B.we need more blood examples and more work to do |
C.we are entering a whole new field of research |
D.this is an extremely important study |
A.Political. | B.Fashion. | C.Food. | D.Environment. |
6 . Microplastics — tiny pieces of plastic waste less than five millimetres long that have been degraded by waves, wind and ultraviolet rays — have been discovered in the deepest oceanic trenches and within the stomachs of the organisms that live there, but we have little idea about where the great majority of them end up. More than eight million tonnes of plastic enters our oceans every year, comprising between 80 and 85 percent of all marine trash, but with inadequate data, there are concerns that these figures could be underestimates.
Currently, most of the data we have on microplastics are accidentally captured by research ships, which use plankton nets to collect marine-microorganism samples. However, researchers Christopher Ruf and Madeline Evans from the University of Michigan have discovered an innovative way to identify and track concentrations of microplastics in the ocean.
The technique relies on NASA’s Cyclone Global Navigation Satellite System (CYGNSS), a constellation of eight micro-satellites used to predict hurricanes that calculate wind speeds above the ocean by measuring the roughness of surface waters. As the satellites are continuously recording, Ruf and Evans realised that they collect a great deal of additional data. It was while analysing these data that they noticed some differences-times where the surface of the ocean appeared to be much smoother than it should, given the prevailing wind (盛行风) conditions.
Knowing that water isn’t roughened as much when it contains a lot of floating material, Ruf and Evans identified a pattern that linked areas of unusual smoothness and predicted microplastic distributions. They found that the difference between their measurements, and how much rougher the surface would be if winds of the same speed were blowing across clear water, was “highly correlated with the presence of microplastics, and the degree of the difference also correlated with the concentration of the plastics.”
The research reveals that there are seasonal variations,where the concentrations of microplastics tend to be higher in the summer and lower in the winter in a very clean, periodic way, which Ruf explains mirrors the way in which the ocean circulation changes throughout the year. It also confirms, as was previously thought, that rivers are the main source of ocean microplastics.
Raising awareness of the issue of ocean microplastics among the public and politicians is just one of the researchers’ future aims; they are also in conversation with Duteh non-profit The Ocean Cleanup and Finnish clean-technology specialist Clewat, which are interested in using the information to more efficiently target their trash-collection campaigns.
So far, only one year’s worth of data have been processed since CYGNSS was launched in 2016. By looking at a longer time period, Ruf and Evans aim to determine whether the seasonal pattern is repeatable, and whether the concentration of micmplastics in the ocean is getting worse.
1. What is Paragraph 1 mainly about?A.The limited knowledge about ocean microplastics. |
B.The harm of ocean microplastics to sea creatures. |
C.The methods of degrading ocean microplasties. |
D.The previous research on ocean microplasties. |
A.has offered data about the repeatable seasonal pattern |
B.guides research ships to gather data about sea animals |
C.provides unexpected data about the changes of sea surface |
D.was designed to measure the distribution of ocean microplastics |
A.Microplastics will end up in the stomachs of the ocean organisms. |
B.Mlicroplastics play a vital role in the yearly ocean circulation changes. |
C.The surface of the ocean can get smoother with more microplastics in it. |
D.The new way of tracking microplastics has helped prevent ocean pollution. |
A.To introduce the technology of CYGNSS. |
B.To present a way to study ocean microplastics. |
C.To test an assumption on ocean microplastics. |
D.To propose a new means of protecting the ocean. |
7 . Flower scents (香味) help pollinators (传粉者) locate their favorite plants. Scientists have established that air pollutants change those scents, throwing off the tracking abilities of such beneficial insects as honeybees. But new lab experiments are the first to confirm that one pollinator, the tobacco hawkmoth, can quickly learn that a pollution-changed scent comes from the jasmine tobacco flower that the insect likes.
Chemical ecologist Markus Knaden and colleagues focused on one pollutant-ozone, the main element in smog. In the lab, his team blew an ozone-changed scent from a tiny tube into a tunnel, with a moth (飞蛾) awaiting at the far end of the tunnel. Usually, when the moth smells the unchanged scent, it flies upwind and uses its long, skinny mouthparts to probe the tube the way that it would a flower. The researchers expected that the changed scent might throw the moth off a little. But the insect wasn’t attracted at all.
In addition to scent, tobacco hawkmoths track flowers visually, so Knaden’s team used the feature, along with a sweet snack, to train the moth to be attracted to a pollution-changed scent. The researchers wrapped a brightly-colored artificial flower around the tube to trick the moth back across the tunnel, despite the unfamiliar scent. And the team added sugar water to the artificial flower. After a moth was given four minutes to taste the sweet stuff, it was attracted to the new smell when sent into the tunnel 15 minutes later, even when neither the sugar water nor the visual signal of the artificial flower was present.
This study focused on only one moth species, but Knaden’s team is now working on planning experiments with other pollinators that are easier to follow than tobacco hawknoths. While he guesses honeybees might also be as adaptable as the moth was, that won’t be true of every pollinator. “The situation can become very bad for insects that are not as clever or cannot see that well. I don’t want the take-home message to be that pollution is not a problem.”
1. What does the underlined word “probe” in paragraph 2 mean?A.Surround. | B.Favour. | C.Access. | D.Examine. |
A.not all moths were attracted to ozone-changed scent as expected |
B.the current research conducted by Knaden is pioneering and wide-ranging |
C.not all pollinators are adaptable to human-driven changes to their environment |
D.the moth didn’t like the new smell without sugar water and artificial flower |
A.Positive. | B.Cautious. | C.Unclear. | D.Critical. |
A.A moth can be rid of the tracking ability to locate its favourite plants. |
B.A moth is able to establish a relationship between pollution and scents. |
C.A moth may outsmart smog by learning to like pollution-changed scent. |
D.A moth is born with an ability to adapt to the changes in the environment. |
8 . Last week came solid evidence that living in toxic Britain can seriously harm your health. Cardiologists at Queen Mary University of London found that even "safe" levels of air pollution are linked to heart abnormalities similar to those seen during the early stages of heart failure. Their study of almost 4,000 people was backed up by a major US study which showed that higher exposure to fine particles and nitrogen oxides is linked to an acceleration in the hardening of the arteries (动脉).
We have long known that air pollution leads to coughing, shortness of breath and irritation in the eyes, nose and throat. It is also clearly linked to respiratory diseases such as asthma and bronchitis, as well as diabetes and some cancers. It is now beyond doubt that children's health is greatly affected, and links have been made between it and Parkinson's, Alzheimer's, dementia and congenital birth defects.
The statistics are alarming. In the UK, more than 2 million people suffer from cardiovascular (心血管的) diseases, and nearly one in seven men and one in 12 women will go on to die from them. Heart disease costs the UK economy nearly £30 bn a year to treat, as much as the state spends on secondary education. It is one of the greatest single drains on the public purse. Britain, however, rejects common sense, and shows little sign that it wants to seriously address pollution any time soon.
Despite the mounting evidence of air pollution's costs and health impact, Britain has had to be dragged screaming through the courts to make it comply with minimal clean air guidelines and laws. Successive governments have continually tried to evade their legal responsibilities, spending millions of pounds fighting in the courts and lobbying the EU to be allowed to continue to pollute.
The government now has a new draft clean air strategy our for consultation until 14 August and claims to be acting faster to tackle air pollution than almost every other major developed economy. It pledges to halve the number of people living in places that do not meet World Health Organization pollution guidelines, and it propose to end the sale of new diesel and petrol cars and vans by 2040.
But intending to cut the air pollution bill by around 12.5% in 12 years and waiting 20 years to be rid of the worst vehicles seems criminally weak. Meanwhile, government is knowingly forging ahead with infrastructure plans that will inevitably increase air pollution. The effect will inevitably be to massively increase air pollution and health costs for millions of Britons.
So could the car-clogged streets of Sunder-land, Birmingham and London, where I lived for many years, have contributed to my disease and those of millions of others? Probably. Could the oil companies be responsible for far more than climate change? Certainly. Could Britain's monstrous and mounting bill for heart disease be partly due to the highly polluting diesel cars that governments so scandalously encouraged us to drive? Quite possibly.
What is certain is that air pollution is now an international scandal, and the cause of a health emergency that governments and industry have failed to address. It undoubtedly threatens life more than any war or disaster. When there are clear alternatives to burning fossil fuels then politicians who do not act to prevent it must stand accused not just of failing to act, but of condoning the mass poisoning of their people.
1. According to the study, ________ is probably unrelated to air pollution.A.diabetes | B.stomachaches | C.Alzheimer | D.artery hardening |
A.British government has been screaming for help in court |
B.EU has dissuaded British government for help in court |
C.British government has tried to have EU's permission for more pollution |
D.The government firmly refused to act in accordance with the clean air guideline. |
A.Britain will implement it faster than other major developed economies. |
B.It presents a practical way to end pollution from vehicles. |
C.Its goal will be achieved at the price of massive health cost. |
D.It's aiming too low when more pollution is expected. |
A.Government officials should feel disgraced for non-action as leaders. |
B.The government should cover the bills for air pollution and related diseases. |
C.Oil companies should not be held accountable for the international scandal. |
D.British government is an irresponsible one for encouraging people to use vehicles. |
9 . COVID-19 lockdowns had strange effects on air pollution across the globe
Ever since the covid-19 spread, many changes have come with the
Researchers found it a strange but
During the lockdown, passenger traffic plumbed, and traffic-related emissions—particularly CO2 and NO2—
A.seemingly | B.absolutely | C.relatively | D.theoretically |
A.criticized | B.issued | C.imposed | D.publicized |
A.suffered | B.witnessed | C.reformed | D.respected |
A.worth | B.busy | C.demand | D.symbolic |
A.rare | B.precious | C.applicable | D.respective |
A.halved | B.growing | C.increasing | D.double |
A.meaningful | B.honorable | C.tough | D.rough |
A.adapt | B.acknowledge | C.accomplish | D.adopt |
A.exchanging | B.reminding | C.persisting | D.concerning |
A.expect | B.treasure | C.test | D.appreciate |
A.relieve | B.settle | C.comfort | D.signal |
A.turned | B.kicked | C.fell | D.crushed |
A.key | B.indirect | C.wide | D.negative |
A.leak | B.collapse | C.lift | D.resist |
A.strike | B.take | C.investigate | D.analyze |
10 . A new report says plastics are responsible for $13 billion in damage to the oceans and the undersea environment. The findings were announced recently at a United Nations conference.
Plastic thrown away carelessly makes its way into rivers and other waterways. The plastic eventually reaches coastal areas and ocean waters. After a while, it collects in the sea. And plastic never goes away. Plastic is not biodegradable — destroyed by bacteria or natural processes. Instead, it just breaks up into smaller pieces over time. The oceans contain a lot of chemicals and other pollutants.
The report also calls on companies to improve methods for using plastics.
A.But people can make a big difference. |
B.Plastics should be gathered together and reused. |
C.Then, fish may eat the plastics. |
D.It is convenient to use plastic bags in everyday life. |
E.It asks for them to better measure and direct plastic use. |
F.The report tells about harm to sea life and what might be done to improve the situation. |