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Moving flight times from night to day could reduce air travel's contributions to global warming, a new study suggests. Scheduling more (laytime flights may reduce the influence of contrails ——the visible lines of white steam that many planes leave behind them in the sky.

The role of contrails in climate change is still being studied, but some scientists believe they contribute to the greenhouse effect by trapping heat in the atmosphere.

Nicola Stuber, first author of the study, suggests that contrails' overall impact on climate change is almost as big as that of aircraft? s carbon dioxide emissions (排放)over a hundred-year period. Aircraft are believed to be responsible for 2-3% of human carbon dioxide emissions. Like other high, thin clouds, contrails reflect sunlight back into space and cool the planet. However, they also trap energy in the atmosphere and increase the warming effect.

Stuber and other scientists believe that the effect of the contrails is big. " On average, the green-house effect controls the effects of contrails,said Stuber, a meteorologist at England's University of Reading. "The warming effect is far greater for contrails left by night flights," Stuber added. "The cooling effect only happens (luring the day when the sun is up. During the night the greenhouse warming is no longer balanced and that is why the contribution of night-flight is so large."

Most commercial airline traffic occurs during daylight hours. For example, only one in four United Kingdom flights is a night flight, but those flights create some 60% of the warming created by contrails, the study reports.

【小题1】How do contrails increase the greenhouse effect?
A.They give off heat.
B.They absorb daylight.
C.They trap heat in the atmosphere.
D.They reflect sunlight back into space.
【小题2】What does the underlined word "they" in Paragraph 3 refer to?
A.carbon dioxide emissionsB.contrails
C.flightsD.thin clouds
【小题3】What did Stuber explain about the contrails in Paragraph 4?
A.What their function is.B.How they cool the Earth.
C.Why they create big warming at night.D.How big their effect is.
【小题4】What can be a suitable title for the text?
A.Airlines Should Schedule Flights
B.Night Flights Face a New Challenge
C.Airplane Contributes Most to Global Warming
D.More Day Flights May Reduce Global Warming
19-20高三上·四川·阶段练习
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Lying alongside mountains of smelly garbage under the South American sun, Cateura is a long way from the conservatories of Prague or Vienna. Yet the township, which grew out of Paraguay's largest dump(垃圾场), is gaining a reputation as a hothouse for musical talent and for its youth orchestra(管弦乐队) that plays instruments made from garbage. "The world sends us garbage. We send back music," says Favio Chavez, leader of the "Recycled Orchestra," during a recent visit by the group to Los Angeles. Orchestra members, poor children from Cateura, play violins fashioned from oven trays and guitars made from dessert dishes. The orchestra provides the youngsters an outlet and an escape, a chance to go beyond the mess of their slum(贫民窟) through the music of Mozart, and even Sinatra. "In the beginning, it was difficult to play," says the l0-year-old violinist Celeste Fleitas." But Favio helped me learn over time. From Favio, I have learned to be more responsible and value the things I have."

The destination for more than 1,500 tons of waste each day, the community has no safe drinking water and little access to electricity or sanitation(卫生设施). Illiteracy is severe, and the children of the township often fall into drugs, violence and crimes.

Favio Chavez, a musical talent, came to Cateura as an environmental technician in 2006 and started a youth music school. He knew shop-bought instruments were beyond the means of villagers whose sheds are worth less than a violin, so he approached a carpenter to make some out of waste from the dump.

The orchestra caught the eye of Paraguayan filmmaker Alejandra Amarilla. She uploaded a short piece of the orchestra to YouTube in 2012, hoping to secure crowdfunding for what would become Landfill Harmonic, a documentary released across the United States this month and promoting the youngsters on a tour of the world's music halls later on.

【小题1】What is the best title of the text?
A.Youngsters carry tunes from garbage to victory
B.A music talent hit the road to the world stage
C.A town for music fans
D.An orchestra on a global tour
【小题2】What do we know about Cateura?
A.It has raised people's awareness of recycling trash
B.It has caught more attention through the orchestra
C.It recycles more than l,500 tons of rubbish per day
D.It provides its children with better schooling conditions
【小题3】Why did Alejandra Amarilla upload a piece of the orchestra to YouTube?
A.To assist the youngsters with a world tour
B.To collect funding for a documentary
C.To organize carpenters to make instruments
D.To catch the eye of the Paraguay government
【小题4】What can we learn from Favio Chavez?
A.To work in a team weighs more
B.To recycle things is to conserve things
C.To be creative is a quality of a leader
D.To own nothing is no excuse to do nothing

Not much happens in the sleepy village of Colaton Raleigh, where almost half of the residents are retired, so local walkers were horrified when they discovered 100 ancient beech trees were cut down.

Residents in the east Devon community are saddened by the loss of the beloved trees, which were cut down by a government agency without consulting the community or council. They were located in a special conservation area and site of special scientific interest, and were home to lots of local plants and animals.

An application was made by a local landowner to the Forestry Commission, a branch of the Department for Environment, Food and Rural Affairs. It would not comment on individual cases, but said all decisions were taken in line with its standards. Alan Pearce, a local tree manager, said, “It certainly ought to be a fairly wide consultation because it’s part of our heritage. Once they’re gone you’re talking about 200 years to regrow. The stumps (树桩) look, nearly all of them, perfectly sound and solid. I can’t see they can say they were diseased or dying. We’re meant to be planting trees, not felling (砍) them.”

He said people were “absolutely horrified”, with one walker in tears over the felling, which he suggested may have been taken to improve grassland in the nearby field.

Resident Fiona Carroll said, “Many people walk in this area as it is part of a large expanse of heathland and they are at a loss as to why this has been allowed to happen. These were valuable landscape and wildlife trees situated along an extensive ancient Devon bank. The roots had grown into large supporting structures giving many a distinctive look.”

Ewan Macdonald, a research fellow at the University of Oxford, who studies how people engage with the environment, said he was not surprised the felling had caused such an emotional reaction because of the way people connected with trees. He said, “It highlights how intrinsically (内在地) bound up things like trees, the environment and conservation are with our culture.”

【小题1】What happened in Colaton Raleigh?
A.Half of its residents retired from their jobs.
B.A government agency felled 100 ancient beech trees.
C.The Forestry Commission made an application to cut down trees.
D.The felling of the trees was done to improve their living conditions.
【小题2】What can we know from the text?
A.The trees were cut down because of disease.
B.The local council didn’t approve of the application.
C.The local residents are eager to protect the environment.
D.The trees were cut down without consulting local villagers.
【小题3】What’s Alan Pearce’s attitude to felling the trees?
A.Supportive.B.Opposed.C.Indifferent.D.Doubtful.
【小题4】Which of the following may Ewan Macdonald probably agree with?
A.Protecting trees is protecting our culture.
B.The felling of trees doesn’t cause emotional reactions.
C.The environment, conservation, and trees are closely linked to our culture.
D.People’s engagement with the environment has no influence on their emotions.

A new survey by non-profit No Meat May has revealed that old-fashioned attitudes towards meat and manliness have not changed. Out of 1000 Aussies questioned, almost 1 in 2 associated a diet high in meat with manliness, including 47% of women. Moreover, 73% of the men surveyed said they would rather die 10 years earlier than give up eating meat. This shocking statistic corresponds to the figure of 90% of previous No Meat May participants being women. Men are significantly less likely to try plant-based options, and it is apparent that doubts about masculinity are at the root cause.

No Meat May co-founder Ryan Alexander explained, “Australian men are still being fed a lie that meat-eating makes them more masculine, when in reality, what’s more masculine than protecting the planet, sparing innocent lives and ensuring you live a long and healthy life for the people you love?”

What was perhaps the most ironic statistic was that 81% of men considered themselves someone who cares about the environment, yet when asked whether they would give up meat if it meant would reduce their impact on the environment, 79% said ‘no’.

This demonstrates the huge power that the media has in convincing men that they would lose their masculinity if they stopped eating meat. Moreover, it shows how much of a barrier it is to making more climate-positive choices.

Significant research over many years has shown that eating meat and other animal products increases the risk of developing certain cancers, heart disease, obesity and having a reduced life expectancy, not to mention being one of the biggest contributors to global warming and the destruction of our environment.

“Yet our survey alarmingly shows that Australian men are either not aware of any of these facts, don’t believe them, or simply don’t care,” Alexander continued.

This data is certainly worrying, not only for global public health but also for the impending climate crisis. It seems that we still have a long way to go in reversing the damage done by overwhelming toxic masculinity plugged by the mainstream media, which is why we need initiatives like No Meat May.

We hope that more men sign up this year, and give meat-free options a go whether it be for health, environmental, or animal welfare reasons!

【小题1】The underlined sentence “This shocking statistic corresponds to the figure of 90% of previous No Meat May participants being women.” implies that _________.
A.male participants account for 10% of the total
B.women are more welcome than men to No Meat May
C.No Meat May is dominantly composed of women
D.the statistic is convincing though it is shocking
【小题2】What might NOT be the reason for men’s sticking to the old-fashioned attitudes towards meat and manliness according to the article?
A.The influence of the mainstream media on men.
B.The expectation from some women.
C.Their preference for meat.
D.Their ignorance of the negative impact on the environment.
【小题3】Which of the following statement is TRUE?
A.According to Ryan Alexander, eating meat is no more masculine than living longer.
B.Meat-eating means higher risk of many diseases such as diabetes.
C.The shocking data from the nation-wide survey in Australia worries the vegan community.
D.The mainstream media is largely responsible for the traditional attitudes towards masculinity.
【小题4】No Meat May is a campaign in which participants have meat-free meals for a month for the sake of _________.
A.health, money and the environment
B.health, animal welfare and science
C.health, animal welfare and the environment
D.health, animal welfare and the break of the gender stereotype

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