Giới thiệu bạn mới – Nhận quà tới 7 triệu

Banner quà tặng độc quyền

Reading Practice: Marine debris

Cố vấn học thuật

GV. Lê Duy Anh - IELTS 8.5 Overall

GV tại IELTS Vietop.

Chelsea Rochman, an ecologist at the University of California, Davis, has been trying to answer a dismal question: Is everything terrible, or are things just very, very bad?

Rochman is a member of the National Center for Ecological Analysis and Synthesis’s marine-debris working group, a collection of scientists who study, among other things, the growing problem of marine debris, also known as ocean trash. Plenty of studies have sounded alarm bells about the state of marine debris; in a recent paper published in the journal Ecology, Rochman and her colleagues set out to determine how many of those perceived risks are real. 

Often, Rochman says, scientists will end a paper by speculating about the broader impacts of what they’ve found. For example, a study could show that certain seabirds eat plastic bags, and go on to warn that whole bird populations are at risk of dying out. ‘But the truth was that nobody had yet tested those perceived threats,’ Rochman says. ‘There wasn’t a lot of information.’

Rochman and her colleagues examined more than a hundred papers on the impacts of marine debris that were published through 2013. Within each paper, they asked what threats scientists had studied – 366 perceived threats in all – and what they’d actually found.

In 83 percent of cases, the perceived dangers of ocean trash were proven true. In the remaining cases, the working group found the studies had weaknesses in design and content which affected the validity of their conclusions – they lacked a control group, for example, or used faulty statistics. 

Strikingly, Rochman says, only one well-designed study failed to find the effect it was looking for, an investigation of mussels ingesting microscopic bits. The plastic moved from the mussels’ stomachs to their bloodstreams, scientists found, and stayed there for weeks – but didn’t seem to stress out the shellfish.

While mussels may be fine eating trash, though, the analysis also gave a clearer picture of the many ways that ocean debris is bothersome.

Within the studies they looked at, most of the proven threats came from plastic debris, rather than other materials like metal or wood. Most of the dangers also involved large pieces of debris – animals getting entangled in trash, for example, or eating it and severely injuring themselves.

But a lot of ocean debris is ‘microplastic’, or pieces smaller than five millimeters. These may be ingredients used in cosmetics and toiletries, fibers shed by synthetic clothing in the wash, or eroded remnants of larger debris. Compared to the number of studies investigating large-scale debris, Rochman’s group found little research on the effects of these tiny bits. ‘There are a lot of open questions still for microplastic,’ Rochman says, though she notes that more papers on the subject have been published since 2013, the cutoff point for the group’s analysis.

There are also, she adds, a lot of open questions about the ways that ocean debris can lead to sea-creature death. Many studies have looked at how plastic affects an individual animal, or that animal’s tissues or cells, rather than whole populations. And in the lab, scientists often use higher concentrations of plastic than what’s really in the ocean. None of that tells us how many birds or fish or sea turtles could die from plastic pollution – or how deaths in one species could affect that animal’s predators, or the rest of the ecosystem.

‘We need to be asking more ecologically relevant questions,’ Rochman says. Usually, scientists don’t know exactly how disasters such as a tanker accidentally spilling its whole cargo of oil and polluting huge areas of the ocean will affect the environment until after they’ve happened. ‘We don’t ask the right questions early enough,’ she says. But if ecologists can understand how the slow-moving effect of ocean trash is damaging ecosystems, they might be able to prevent things from getting worse.

Asking the right questions can help policy makers, and the public, figure out where to focus their attention. The problems that look or sound most dramatic may not be the best places to start. For example, the name of the ‘Great Pacific Garbage Patch’ – a collection of marine debris in the northern Pacific Ocean – might conjure up a vast, floating trash island. In reality though, much of the debris is tiny or below the surface; a person could sail through the area without seeing any trash at all. A Dutch group called ‘The Ocean Cleanup’ is currently working on plans to put mechanical devices in the Pacific Garbage Patch and similar areas to suck up plastic. But a recent paper used simulations to show that strategically positioning the cleanup devices closer to shore would more effectively reduce pollution over the long term.

I think clearing up some of these misperceptions is really important,’ Rochman says. Among scientists as well as in the media, she says, ‘A lot of the images about strandings and entanglement and all of that cause the perception that plastic debris is killing everything in the ocean.’ Interrogating the existing scientific literature can help ecologists figure out which problems really need addressing, and which ones they’d be better off – like the mussels – absorbing and ignoring.

Tham khảo thêm lộ trình học IELTS tại Vietop

Questions 27-33

Do the following statements agree with the information given in Reading Passage 3?

In boxes 27-33 on you answer sheet, write

TRUE           if the statement agrees with the information

FALSE          if the statement contradicts the information

NOT GIVEN    if there is no information on this

27   Rochman and her colleagues were the first people to research the problem of marine debris. 

28   The creatures most in danger from ocean trash are certain seabirds.

29   The studies Rochman has reviewed have already proved that populations of some birds will soon become extinct.

30   Rochman analysed papers on the different kinds of danger caused by ocean trash.

31   Most of the research analysed by Rochman and her colleagues was badly designed.

32   One study examined by Rochman was expecting to find that mussels were harmed by eating plastic.

33   Some mussels choose to eat plastic in preference to their natural diet.

Kỹ năng Reading là 1 trong những kỹ năng quan trọng trong bài thi IELTS. Dạng bài luận Reading Practice với chủ đề Marine debris cũng là 1 trong những dạng thường gặp. Tuy nhiên bạn còn lo lắng về kỹ năng này làm chưa tốt thì hãy tham khảo ngay khóa học IELTS 7.0 tại Vietop English. Đầu tiên, khóa học cam kết giúp học viên đạt được điểm số cao trong kỳ thi IELTS, mở ra cơ hội học tập và làm việc tại nhiều quốc gia trên thế giới. Thứ hai, chương trình học được thiết kế bài bản với giáo trình hiện đại và đội ngũ giảng viên giàu kinh nghiệm, giúp học viên nắm vững kiến thức và kỹ năng cần thiết.

Cuối cùng, môi trường học tập chuyên nghiệp và thân thiện tại trung tâm khuyến khích học viên phát triển toàn diện, từ kỹ năng ngôn ngữ đến kỹ năng mềm, tạo nền tảng vững chắc cho tương lai. Và bạn không phải lo lắng gặp phải phương pháp “mì ăn liền” khi chỉ tập trung vào mẹo, tips làm bài, khiến cho việc học IELTS chỉ dừng ở tấm bằng mà không có tính ứng dụng vào thực tế. Vietop cam kết đầu ra và cam kết học là phải dùng được. Vì thế còn chần chờ gì nữa mà không đăng ký ngay khóa học tại trung tâm để nhận nhiều ưu đãi hấp dẫn ngay hôm nay.

Questions 34-39

Complete the notes below.

Choose ONE WORD ONLY from the passage for each answer.

Write your answers in boxes 34-39 on your answer sheet.

Findings related to marine debris

Studies of marine debris found the biggest threats were

•   plastic (not metal or wood)

•   bits of debris that were 34………………………….. (harmful to animals)

There was little research into 35…………………………. e.g. from synthetic fibres.

Drawbacks of the studies examined

•   most of them focused on individual animals, not entire 36 ………………………..

•   the 37…………………….. of plastic used in the lab did not always reflect those in the ocean

•   there was insufficient information on

–   numbers of animals which could be affected

–   the impact of a reduction in numbers on the 38……………………….. of that species

–   the impact on the ecosystem

Rochman says more information is needed on the possible impact of future 39………………………… (e.g. involving oil).

Question 40

Choose the correct letter, A, B, C or D.

Write the correct letter in box 40 on your answer sheet.

40   What would be the best title for this passage?

A   Assessing the threat of marine debris

B   Marine debris: who is to blame?

C   A new solution to the problem of marine debris

D   Marine debris: the need for international action

Xem thêm: The Forgotten Forest

Answers

27. FALSE (Đoạn 2, “Plenty of studies have sounded alarm bells about the state of marine debris” → Trước khi Chelsea Hochman và nhóm này nghiên cứu là đã có những người đưa ra cảnh báo rồi; Họ không phải những người đầu tiên) 

28. NOT GIVEN (Không có thông tin về việc loài vật nào chịu ảnh hưởng nặng nề nhất)

29. FALSE (Đoạn 3, “For example, a study could show that certain seabirds eat plastic bags, and go on to warn that whole bird populations are at risk of dying out. ‘But the truth was that nobody had yet tested those perceived threats,’ Rochman says. ‘There wasn’t a lot of information.’” → Không có nhiều bằng chứng chỉ ra rằng loài chim sẽ bị tuyệt chủng 

30. TRUE (Đoạn 4, “Rochman and her colleagues examined more than a hundred papers on the impacts of marine debris that were published through 2013. Within each paper, they asked what threats scientists had studied – 366 perceived threats in all” → Nghiên cứu hơn 100 bài viết nói về vấn đề này) 

31. FALSE (Đoạn 4, “In 83 percent of cases, the perceived dangers of ocean trash were proven true. … design and content which affected the validity of their conclusions – they lacked a control group, for example, or used faulty statistics.” → Chỉ là báo cáo hiện tại có một vài lỗi, chứ không phải hầu hết ca trước đó bị sai)

32. TRUE (Đoạn 6, “Strikingly, Rochman says, …The plastic moved from the mussels’ stomachs to their bloodstreams, scientists found, and stayed there for weeks – but didn’t seem to stress out the shellfish.” → Rochman mong muốn tìm ra những trai đang gặp nguy hại vì ăn phải nhựa dưới đại dương) 

33. NOT GIVEN (Không có thông tin về việc Trai phải ăn nhựa vì không có sự lựa chọn nào khác) 

34. Large (Đoạn 8, “Most of the dangers also involved large pieces of debris”)

35. Microplastic (Đoạn 9, “But a lot of ocean debris is ‘microplastic’”) 

36. Populations (Đoạn 10, “Many studies have looked at how plastic affects an individual animal, or that animal’s tissues or cells, rather than whole populations.”)

37. Concentrations (Đoạn 10, “And in the lab, scientists often use higher concentrations of plastic than what’s really in the ocean.”)

38. Predators (Đoạn 10, “or how deaths in one species could affect that animal’s predators, or the rest of the ecosystem.”)

39. Disasters (Đoạn 11, “Rochman says. Usually, scientists don’t know exactly how disasters such as a tanker accidentally spilling its whole cargo of oil….” 

40. A (Bài viết đưa ra đánh giá về những mối đe doạ của rác thải đại dương)

Luyện thi IELTS

Banner launching Moore

Ngọc Hương

Content Writer

Tôi hiện là Content Writer tại công ty TNHH Anh ngữ Vietop – Trung tâm đào tạo và luyện thi IELTS tại TP.HCM. Với hơn 3 năm kinh nghiệm trong việc sáng tạo nội dung học thuật, tôi luôn không ngừng nghiên cứu và phát triển những nội dung chất lượng về tiếng Anh, IELTS …

Bạn còn thắc mắc về kiến thức này?

Hãy để lại bình luận, đội ngũ biên tập viên và cố vấn học thuật của Vietop English sẽ giải đáp & giúp bạn hiểu sâu hơn về chủ đề này 😍.

Bình luận


The reCAPTCHA verification period has expired. Please reload the page.

Quà tặng khi đăng kí học tại Vietop
Lệ phí thi IELTS tại IDP
Quà tặng khi giới thiệu bạn đăng kí học tại Vietop
Thi thử IELTS miễn tại Vietop

Cùng Vietop chinh phục IELTS

Hơn 21.220+ học viên đã thành công đạt điểm IELTS đầu ra. Bạn có muốn trở thành người tiếp theo?

Vui lòng nhập tên của bạn
Số điện thoại của bạn không đúng

Thời gian bạn muốn nhận tư vấn:

Sáng:
09h - 10h
10h - 11h
11h - 12h
Chiều:
14h - 15h
15h - 16h
16h - 17h
Tối:
17h - 19h
19h - 20h
20h - 21h