YOMEDIA
NONE

Answer the question why the air is polluted?

why is the air polluted

Theo dõi Vi phạm
ATNETWORK

Trả lời (1)



  • What causes air pollution?

    Air pollution can result from both human and natural actions. Natural events that pollute the air include forest fires, volcanic eruptions, wind erosion, pollen dispersal, evaporation of organic compounds and natural radioactivity. Pollution from natural occurrences is not very often.

    Human activities that result in air pollution include:

    1. Emissions from industries and manufacturing activities

    Consider a typical manufacturing plant: You will notice that there are long tubes (called chimneys) erected high into the air, with lots of smoke and fumes coming out of it. Waste incinerators, manufacturing industries and power plants emit high levels of carbon monoxide, organic compounds, and chemicals into the air. This happens almost everywhere that people live. Petroleum refineries also release lots of hydrocarbons into the air.

    2. Burning Fossil Fuels
    After the industrial age, transportation has become a key part of our lives. Cars and heavy duty trucks, trains, shipping vessels and airplanes all burn lots of fossil fuels to work. Emissions from automobile engines contain both primary and secondary pollutants. This is a major cause of pollution and one that is very difficult to manage. This is because humans rely heavily on vehicles and engines for transporting people, good and services.

    Fumes from car exhausts contain dangerous gases such as carbon monoxide, oxides of nitrogen, hydrocarbons and particulates. On their own, they cause great harm to people who breathe them. Additionally, they react with environmental gases to create further toxic gases.

    3. Household and Farming Chemicals
    Crop dusting, fumigating homes, household cleaning products or painting supplies, over the counter insect/pest killers, fertilizer dust emit harmful chemicals into the air and cause pollution. In many cases, when we use these chemicals at home or offices with no or little ventilation, we may fall ill if we breathe them.

    Bài dịch:



    Nguyên nhân gây ô nhiễm không khí là gì?

    Ô nhiễm không khí có thể là kết quả của cả hành động của con người và tự nhiên. Các sự kiện tự nhiên gây ô nhiễm không khí bao gồm cháy rừng, phun trào núi lửa, xói mòn gió, phân tán phấn hoa, bốc hơi các hợp chất hữu cơ và phóng xạ tự nhiên. Ô nhiễm từ các hiện tượng tự nhiên không thường xuyên xảy ra.

    Các hoạt động của con người dẫn đến ô nhiễm không khí bao gồm:

    1. Phát thải từ các ngành công nghiệp và hoạt động sản xuất

    Xem xét một nhà máy sản xuất điển hình: Bạn sẽ nhận thấy rằng có những ống dài (được gọi là ống khói) được dựng lên trong không khí, với rất nhiều khói và khói phát ra từ đó. Lò đốt chất thải, công nghiệp sản xuất và nhà máy phát thải cácbon monoxit, các hợp chất hữu cơ và hóa chất cao vào trong không khí. Điều này xảy ra hầu như ở mọi nơi mọi người sống. Các nhà máy lọc dầu cũng giải phóng rất nhiều hydrocacbon vào trong không khí.

    2. Đốt nhiên liệu hóa thạch
    Sau thời đại công nghiệp, giao thông vận tải đã trở thành một phần quan trọng trong cuộc sống của chúng ta. Ô tô và xe tải hạng nặng, tàu hỏa, tàu vận chuyển và máy bay đều đốt rất nhiều nhiên liệu hoá thạch để làm việc. Phát thải từ động cơ ô tô chứa cả ô nhiễm nguyên sinh và thứ cấp. Đây là một trong những nguyên nhân chính gây ô nhiễm và rất khó quản lý. Điều này là do con người phụ thuộc nhiều vào phương tiện và động cơ để vận chuyển người, hàng tốt và dịch vụ.

    Hút thuốc lá từ khí thải xe có chứa các khí nguy hiểm như carbon monoxide, oxit nitơ, hydrocarbon và các hạt. Ngày của riêng mình, chúng gây ra thiệt hại lớn cho những người hít thở chúng. Thêm vào đó, chúng phản ứng với các khí môi trường để tạo ra thêm các khí độc hại.

    3. Hóa chất gia đình và nông nghiệp
    Làm sạch bụi cây, nhà xông khói, sản phẩm vệ sinh gia đình hoặc sơn, thuốc trừ sâu, bụi phân bón gây ra các chất độc hại vào không khí và gây ô nhiễm. Trong nhiều trường hợp, khi chúng tôi sử dụng các hóa chất này tại nhà hoặc các văn phòng không có hoặc thông hơi nhỏ, chúng tôi có thể bị ốm nếu chúng ta hít thở chúng.

      bởi Tráng kháy Phìn 16/12/2019
    Like (0) Báo cáo sai phạm

Nếu bạn hỏi, bạn chỉ thu về một câu trả lời.
Nhưng khi bạn suy nghĩ trả lời, bạn sẽ thu về gấp bội!

Lưu ý: Các trường hợp cố tình spam câu trả lời hoặc bị báo xấu trên 5 lần sẽ bị khóa tài khoản

Gửi câu trả lời Hủy
 
NONE

Các câu hỏi mới

  • The teacher made her students_________lazy. (not be)

    09/12/2022 |   1 Trả lời

  • - Introduce your friend: where does he/she come from? When does he/she come?

    - School: teachers/ students/ facilities.

    - What do you want to cooperate with your friends to help poor students in the countryside.

    13/12/2022 |   1 Trả lời

  • 30/12/2022 |   0 Trả lời

  • 02/01/2023 |   1 Trả lời

  • 26/01/2023 |   0 Trả lời

  • Living in the country has both advantages and disadvantages. There are certainly many advantages to live in the country. First, you can enjoy peace and quietness. The air in the countryside is often fresher than in the city. Second, people tend to be friendlier. They live not very far from the others; they know each other very well. If someone needs help, they are ready to help anytime. Moreover, there is less traffic, so it is safer for young children. However, there are certain disadvantages to life outside the city. First, because there are fewer people, you are likely to have few friends. In addition, entertainment is difficult to find, particularly in the evening. Moreover, education seems to be less developed than it in the city. Therefore, the children are less accessed to the modern technology. On the whole, it is often the best for those who are retired or who have young children to live in the country. In contrast, young people who have a career are better provided in the city.

    1. What is the topic of the writing?

    2. How many advantages of living in the country mentioned?

    3. Are there any disadvantages of living in the country?

    4. Do you like to live in the city or in the countryside? Why?

    29/01/2023 |   0 Trả lời

  • 1. A: have you got a spare pen I can borrow?

    B: ...................(No/afaird). I've only got one

    2. A: Is it going to snow today?

    B: ..........(Yes/believe). It's very cold

    3. A: Is Frank coming to work today?

    B: .............(No/think).He would have been here by now

    4. A: Are you going out to dinner on your birthday?

    B: ............(Yes/expect). I usually do.

    5. Are you ready to leave?

    .............(yes/suppose). Let's go

    6. Is mary at home?

    ..... (no/suppose) no one is answering the telephone

    7. Are you going on holiday this summer?

    .........(yes/hope). I've been saving money since January

    04/02/2023 |   0 Trả lời

  • 1. She was really greatful to me for my use ful ___. (assist)

    2. ___ appeal to the government to enact laws to stop factories from discharging toxic chemicals in to the see. (enviroment)

    3. he is sure to have an accident because he drives very ___. (care)

    4. indonesia orders immediate ___ as highest alerts issued for bali colcano. (ecacuate)

    5. ___, he failed the exam. (fortunate)

    6. A thrre-___object can be measured in three different directions. (dimension)

    7. The duty of the police is the___of law and order. (maintain)

    8. Is the loch ness monster a real or___creature? (legend)

    9. The radiation leak has had a___effect on the enviroment. (disaster)

    13/02/2023 |   0 Trả lời

  • - She pays a lot of money.

    - I draw a picture.

    - Elmer entertained the guests.

    - Dennis Bergkamp scored the goal of the year.

    - Benny never understands the new teacher.

    - The students converted each sentence to passive.

    - They don't help you.

    - They wear blue shoes.

    - Tom and Max ate five hamburgers.

    - How did they steal her car?

    - Three men robbed the local bank.

    - Everyone follows the rules.

    - Does the police officer catch the thief?

     
     

    26/02/2023 |   1 Trả lời

  • 1. A flood_________ when a large amount of water covers the land.

    A. occurs B. is occurred C. is occurring D. has occurred

    2. So far, some of the storm damaged roads and bridges_________.

    A. already repaired B. had already repaired C. were already repaired D. have already been repaired

    3. Villagers ___________ before the volcano erupted.

    A. had already been evacuated B. evacuated C. has already evacuated D. evacuate

    4. By the time we found the shelter, some of us ___________ sick.

    A. become B. became C. has become D. had become

    5. The countrys ________________ language is Spanish.

    A. officially B. official C. office D. officer

    6. Grand Palace is one of the most popular tourist _________ In Thailand.

    A. attracts B. attractions C. attractive D. attracted

    7. New Zealand is __________ for its _________ beauty.

    A. known/ nature B. known/ natural C. famous/ natural D. famous/ nature

    8.The dove is a universal __________ of place.

    A. symbolizing B. symbolize C. symbolic D. symbol

    9. Have you heard the news? A powerful earthquake and following tsunami hit the island of Sulawesi, Indonesia. - _________

    A. How beautiful! B. Awesome! C. How terrible! D. No problem.

    10. Rescue workers saved a girl trapped in a collapsed school building. - _________

    A. Thats great! B. Good luck. C. How convenient! D. Oh dear!

    11. Forecasters say that the storm wont move toward the land. - _________

    A. What a pity! B. Never mind. C. Thats a relief! D. Its OK.

    12. Did you know the Amazon rainforest fires have already been controlled. - No, I didnt.

    A. What a bad day! B. How wonderful! C. How thoughtful it is! D. Well done

    21/03/2023 |   0 Trả lời

  • 29/03/2023 |   1 Trả lời

  • 1. A metal            B scatter          C package          D math

    2. A smell            B press             C melt               D refill

    3. A those            B clothes          C shopping        D envelope

    4. A down            B throw           C nowadays       D how

    5. A plants           B field           C trees              D newspapers

    02/04/2023 |   2 Trả lời

  • if you eat too much sweet food, youon weight
    ​ A. will be putting B. are putting C. are going to put D. will put

    01/05/2023 |   0 Trả lời

  • Use the words/ phrases given to make meningful and correct sentences. You xan add some words or make some changes 

    33 they/travel/in Vietnam/at/this/time/tomorrow?

    ................................

    34 hoa told Tom/they were/ having/a/wonderful time/Da Lat.

    ...................

    35 If/i becam/rich, I/spend/all/time/travelling

    ................

    36 If/a good mark/ got/in/your test,what/will/parents/do?

    .......................

     

    03/05/2023 |   0 Trả lời

  • Jack was careless not to recheck the contract. The project is still incomplete now.

    => It was Jack's ...

    06/05/2023 |   0 Trả lời

  •  We often buy new clothes for our children on Tet

    07/05/2023 |   0 Trả lời

  • II. Read the text. Then answer the questions (1.0 point)

    1.  

    In Scotland, the biggest celebration of the year is ‘Hogmanay’. Hogmanay is the Scottish word for New Year’s Eve. On 31st December in Edinburgh, there is an enormous firework display at the castle, and they play live music in the park. Thousands of people gather in the streets, cafes and bars. Then, at 12 o’clock, church bells ring all over the city.

    After midnight, people go ‘first footing’. This is a Scottish custom that dates back hundreds of years. First footing is visiting your neighbours after midnight on New Year’s Eve. The visitors must step into the house with their right foot first, to bring good luck. Traditionally the visitors bring three gifts: a piece of coal, a piece of ‘shortbread’ (Scottish biscuit) and a little whisky. The gifts symbolize warmth, food and happiness. If the first person who visits your home after midnight is a man with dark hair, that is particularly lucky!

    1. What does the word “Hogmanay” mean?
    2. Where do they play live music on New Year’s Eve?
    3. When do people go ‘first footing’?
    4. What do the gifts symbolise?
    5. What kind of first visitor is especially lucky?

    E. WRITING

    I. Choose the sentence that is closest in meaning to the given sentence (1 point)

    41. Thomas had already left his home before we arrived.
    A. After we arrived, Thomas had already left his home.

    B.  By the time Thomas left his home, we had arrived.

    C.  After Thomas had already left his home, we arrived.

    D. Thomas already left his home after we arrived.

    42. She showed her ticket to the airline agent.

    1.  Her ticket showed to the airline agent.
    2. Her ticket was shown to the airline agent.
    3.  Her ticket is shown to the airline agent.
    4. Her ticket is showed to the airline agent.

    43. The computer was expensive; however, we bought it.

    1.  Although the computer was expensive, but we bought it.
    2. Despite the expensive computer, we bought it.

    C. Despite the computer was expensive, we bought it.

    D. However the computer was expensive, we bought it.

    44. “My sister painted this picture last week,” Mary said to me.

    1. Mary told me that her sister painted this picture last week.
    2. Mary said to me that her sister had painted this picture the previous week.
    3. Mary said to me that my sister painted this picture last week.
    4. Mary told me that her sister had painted that picture the week before.

    45. Take exercise regularly and you’ll be fit and healthy.

    1.  If you take exercise regularly, you will be fit and healthy.
    2.  If you are fit and healthy, you will take exercise regulary.
    3. If you don't take exercise regularly, you'll be fit and healthy.
    4.  If you took exercise regulary, you would be fit and healthy.

    08/05/2023 |   0 Trả lời

  • Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

    A.logical  B.hopeless C.uneasy D. transitive

    A. meaningful B. helpless C. forgetful D. waterless

    16/05/2023 |   0 Trả lời

  • VII - make questions for the underlined part in the following sentences

    1.we sometimes stay up late on Friday night.

    2. many girls do aerobics at the weekend.

    05/07/2023 |   0 Trả lời

  • 1.I/ pay /visit/ to/ him /before/ I/ went/ away/a/ hope

    2.Even/ he/ able/ do/deal/great/he/old/is/to/of/work/a/is/if

    3.Since/clever,/to/be/able/you/you/so/explain/this/will/are

     

    21/07/2023 |   0 Trả lời

  • Choose the letter A, B, C or D the word that has the underlined part different from others:

    A. adore    

    B. world    

    C. worker    

    D. word

    06/08/2023 |   1 Trả lời

  • Choose the letter A, B, C or D to complete the sentences: He adores __________ out with his friends at weekends.

    A. hang    

    B. hanging

    C. to hang    

    D. hangs

    07/08/2023 |   1 Trả lời

  • Choose the letter A, B, C or D to complete the sentences: My brother is addicted ___________ playing beach games.

    A. on    

    B. of

    C. to    

    D. at

    07/08/2023 |   2 Trả lời

  • Choose the correct answer: We need a craft ___________ to do dome DIYs.

    A. kit    

    B. street

    C. bracelet    

    D. leisure

    07/08/2023 |   1 Trả lời

  • my/ to/ went/ with/ by/ her/ mother/ Da Nang/ friends/ plane/.

    16/08/2023 |   0 Trả lời

AANETWORK
 

 

YOMEDIA
ATNETWORK
ON