Artificial light is an important factor that contributes effectively in the process of socio-economic development. And in fact, the industrial society has been too dependent on artificial light because it is used to illuminate public places, offices, factories, residential areas ... to meet and serve activities. However, when light is not used effectively, causing excessive light is the cause of pollution. light.Based on the characteriss of the sources and the object affected, light pollution is classified into the following categories: light intrusion, light abuse, glare, mess and light. usurp the sky.
Intrusion light occurs when light reflects on unwanted or unwanted areas. Such as street lights shining into the windows of roadside apartments, the result could be insomnia for those who live in them.Bright light is the result of the opposite of the light and dark areas in the view. When bright light is shining directly into the eyes of pedestrians will lose visibility in the night and this problem is especially serious for traffic safety.
Light abuse is excessive use of light, causing waste. The main cause of this problem is not turning off the light when not needed or inappropriate lighting design makes the use of light larger than necessary or the light does not focus on the necessary area.The light is cluttered due to the excessive use of multiple light sources. At the same time, they are arranged to create interwoven light streams. Typically, there are too many advertising lights on the streets. This is also a cause for pedestrians to easily lose focus and can lead to accidents.
Light appropriating the sky usually occurs in densely populated areas, especially in modern urban areas. All the light from different sources reflects off the night sky, causing the area to shine brightly when viewed from afar. This problem especially affects astronomers when observing stars.

1.If taechers taech environmental issues at school, students will more aware of protecting the environment

2. If light pollution will happens, animals will change their behaviour patterns.

3.If we switch from nuclear power to renewable renewable energy sources, the levels off radioactive pollution will decrease

4. If the water temperature increases, some aqua creatures will unable to reroduces

5. If the water is contaminated, people will get more diseases

CHERRY

i am hungry because my father is not funny

1. Has Helen ever tried sushi?

2. Did you go to the wedding last night?

3.I have never been to Paris

4. This year I have travelled to athens 3 times so far

5.Paul and Judith have been married since 1998

6. Have you finished your homework yet?

7. Last night, aunt Betty came by.She told us that this summer they are going to Hawaii.

8. When did you come to greece?

9. I came in 2007?

10. Did you watch the film E.T yesterday?

11.I met him in 2009,so I have known him for 3 years.

12.What was happened to Lucy last night?

13.Have you ever read "Harry Potter" when you were on holidays?

     P/s: Không biết có đúng ko nữa

Nếu bn đăng câu hỏi ko liên quan đến Toán, Văn, Anh thì

ĐỌC PHẦN LƯU Ý TRONG TAB TẠO CÂU HỎI MỚI ĐI!!!!

1C 2B 3D

1.by

2.to

3.on

4.of

5.of

6.for

7.of

K CHO MÌNH NHA

1.I cooking in my free time. It makes me feel relaxed. (relax)

2.My sister doesn’t surfing the Internet, she says it is boring. (bore)

3.Skateboarding is her hobby. It is also one of the most popular sports of the teenagers in this town. (popularity)

4.My close friend gave me a wonderful present on my birthday. I it so much. (wonder)

5.My brother works as a volunteer for an animal protection organization. He really loves his job. (organize)

học tốt

1) I cooking in my freetime. It makes me feel(relax ) relaxed

2) My sister doesn"t  search  in the Internet.she say it(bore) boring

3) Skateboarding in hẻr hobby . it is also one of the most(populasity)sport of the teeragers in the town popular

4) my close frieng gave me a(wonder) present on my birthday.i it so much wonderful

5) My brother works as a volunteer for an animal  protection (organice) he relly love his JOB oganization

Học tốt~~~

Minn

1. His family is said to have a lot of money in his house.

2. It is said that the train leaves at 12 a.m

3. Wind is said to have pass the exam last week.

4. We are said to have eaten Korean's food for 2 months.

5. Jun is said to be a handsome boy.

1. It is said that his family has a lot of money in his house.

2.It is said that train leaves at 12 a.m.

3.It is said that Wind ..... week.

4.It said that we have eaten .....

5.it is said that Jun is a handsome boy.

1. Millions of newspaper and paper bags are being thrown away everyday.

2. For every ton of recycled newsprint, nearly ten trees can be saved.

3.Books published by Kim Dong publisher are being sold out so quickly.

4. The circus show attract the children.

5. We are going to a meeting being held by the Y.Y club.

6. Waste paper and old clothes will be collected for our mini-project.

1.A      2.B     3.B      4.A

1. Do you mind helping me put the chair away?

2. Vinh is always forgetting the homework.

3. It's very important to keep the environment clean.

4. People recycled old car tires to make shoes and sandals.

5. I haven't spoken to her for three years.

6. Tam used to type faster than she does now.

7. When did you start using the car?

8. We have lived here for 15 years.

9. How about meeting inside the center, at the cafe corner?

10. It's the first time i have ever eaten this kind of cake.