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Tham khảo:
Perilous pollutants may contain various types of impurities including harmful chemicals, dissolved gases, suspended matters, dissolved minerals, and even microbes. All the contaminants reduce the level of dissolved oxygen in the water and affecting the lives of animals and human beings to a great extent. Dissolved oxygen is the oxygen present in water required by the aquatic system to continue the lives of plants and animals. However biochemical oxygen is the demanded oxygen by the aerobic micro-organisms to oxidize organic matters of wastes. Water pollution is caused by two means, one is natural water pollution ( due to the leaching of rocks, decay of organic matters, decay of dead matters, silting, soil erosion, etc ) and another one is man-made water pollution ( due to the deforestation, set up of industries near large water bodies, high level emission of industrial wastes, domestic sewage, synthetic chemicals, radio-active wastes, fertilizers, insecticides, pesticides etc )
Air pollution: Definition: air pollution is a mixture of solid particles and gases in the air. CAuse: have a two main cause : The first is from nature as acid rain. The second is from people acting as vehicles emitting dust and smoke. Effect:harmful to humans , making animals and plants unable to live, causing serious illness. Sollution: planting trees, improve human working machines, educating people on mesures to raise awareness of environmental protection
Visual pollution is an aesthetic issue and refers to the impacts of pollution that impair one's ability to enjoy a vista or view.
Visual pollution disturbs the visual areas of people by creating harmful changes in the natural environment. Billboards[1],[2] open storage of trash, antennas, electric wires, buildings, and automobiles are often considered visual pollution. An overcrowding of an area causes visual pollution. Visual pollution is defined as the whole of irregular formations, which are mostly found in natural and.[3][4]
Effects of exposure to visual pollution include: distraction, eye fatigue, decreases in opinion diversity, and loss of identity
It all goes back to the history of recycling. Starting in 1900, people recycled pots, pans, and other metals by melting them down. But as more plastic products were made, Recycling got confusing and codes were created. Thus, recycling codes are important so you know what to recycle. Now, recycling is more important than ever. Incentive programs are encouraging people to recycle more and help the environment. Recycling is done all over the world. In certain countries, some programs pay you for recycling products. Recycling is the third ‘R’ of Reduce, Reuse and Recycle. As you contribute your bit towards recycling and making the environment clean, keep the following in mind:
- If you don’t need something then don’t buy it. By this, you would be reducing the amount of waste you produce.
- If there is a necessity to buy, go for something that has very less amount of packing, the product that can be reused or something that can be composted. Buy products that are eco-friendly.
- Try buying the products that are made of recycled material. Paper and plastic are some examples of recycled products.
Before throwing anything, think a way to reuse that item ,plastic containers can be used to store items in the refrigerator,old items can be given to charitable organizations where they can be utilized,cans and containers so we must recycling.
Chọn đáp án đúng
1. I am interested in learning more about the customs of other countries
A. attractions B. language C. traditions D. people
2. " I think the girls in Cham's dresses are the most beautiful . Do you agree .......................... me ? "
A. for B. to C. about D. with
3. We don't have the custom .......................... giving present at Christmas
A. with B. in C. of D. on
4. .............................. pollution can directly cause hearing loss
A. Visual B. Soil C. Thermal D. Noise
5. Once upon ............... , there was a good king and his queen
A. the time B. the year C. a time D. a year
6. The water temperature in streams , rivers , oceans change in the affect of ..................
A. thermal pollution B. radioactive pollution C. light pollution D. visual pollution
Tham khảo mấy cái definition với causes effects solutions r tự viết he
Soil pollution happens when human activities destroy the earth’s surface.
Causes: pesticides, herbicides, chemical industrial waste, deforestation...
Effects: soil pollution, soil erosions, the upper layer of soil is damaged, effects on wild-life...
Solutions: Fine heavily people who cut the forest and those who release chemicals waste into the ground.
Refer:
Nowadays, pollution is a popular term with everyone in the world and air pollution is one type of pollution. The definition of air pollution is one such form that refers to the contamination of the air, irrespective of indoors or outside. A physical, biological or chemical alteration to the air in the atmosphere can be termed as pollution. There are some main reasons which cause air contamination such as burning of fossil fuels, agricultural activities, exhaust from factories and industries, mining operations, and indoor air pollution. Air pollution always has bad effects on our life. Harmful gases, dust, and smoke enter into the atmosphere and make it difficult for plants, animals and humans to survive. We also can see some examples of the result of air contamination which occurs around us as global warming, acid rain, and depletion of ozone layer. The effects of air pollution are alarming, so governments over the world should have suitable policies of protecting the environment, especially air quality to create a clean world for our generation in the future.
refer
I think that the best leisure activity for teenagers is playing sports. Firstly, they can find friends who have the same interests. Secondly, physical activities are a good way to relieve stress and reduce depression. Moreover, sports can help develop teamwork and leadership skills that may be very necessary for their future jobs. Their parents should give advice on choosing a suitable leisure activity; however, teenagers themselves will make the final decision.
2/ ENVIRONMENT
Nowadays, our natural environment is suffering more and more the terrible human impact. At the moment, there are a lot of environmental problems, like desforestation, the destruction of the ozone layer, acid rain, the greenhouse effect, pollution in the air with traffic humes, and harmful chemicals which are released into the atmosphere, pollution in the rivers and oceans with illegal effluents, sewage spills, industrial waste, drinking water is being contamined due to river pollution…. (and so on)….
All this take parts of a terrible situation and involves awful drawbacks in our planet. The destruction of the rainforest carries many animals are wiped out, fish supplies are depleted through overfishing, pollution is very harmful for us, besides, there are methods of electricity generation (which emit greenhouse gases), and contribute to global warming.
Our governments have to improve their natural measures. It is important to support alternative source of power, like solar stations, wind power… These one should be easy to live and work with, safe, practical, cheap and clean. On top of that, they are higly productive and friendly with the planet. Besides, our goverments should have stricker laws and hard punishments for illegal hunting, encourage countries to control the number of trees are cut down, reduce gases emitted from factories (and so on)…
On the other hand, we all have to be aware about this problem, and contribute to conserve our planet, like: switch off the lights, ride a bicycle, insulate our houses, use public transport, use less petrol and electricity, save on water, recycle our rubbish ….. In this way, we all can contribute to conservate our environment and wildlife.
Our environment affects all of us. We share the same planet. We all have to be aware of the necessity of improve our natural world. The environmental organizations play an important role, but we all can do a little effort in being much more ecological.
(*Nota: El tema de “Environment” es un poco lioso. No hace falta estudiarse conceptos muy específicos ni ser un especialista en la materia. Sólo llevar las ideas claras y además que esas ideas sean muy sencillas. No hace falta entrar en mucha materia).
5/ Learning is often considered to be a normal part of working and personal life. Both learning for achieving a job as well as for achieving knowledge should not be neglected. Online environment is changing continuously and it represents a great opportunity for learning. It is very important to discover how to learn using all available communicatio
Online Learning Advantages and Disadvantages
Nowadays, online learning turns out to be more and more practiced. Many traditional universities started to share their courses online for free. It represents an easy and comfortable method to achieve knowledge in almost every field, from law and accounting, to human sciences, such as psychology and sociology or history. Online learning is a great alternative to traditional universities, especially for people who can’t afford the time and money to take real courses.
Advantages of Online Learning
Although many people still consider traditional universities as the best way to achieve knowledge and get a diploma, online learning proves to be a great alternative. Students have the chance to study in their own time and especially for free. It represents a great way to study many fields and to boost the level of self-motivation. Online learning is so effective because students can finish their homework quickly, and there is more time left for hobbies or for finding a job.
An access to all resources of a traditional course helps participants learn wherever they are, leaving them the freedom to choose the time for study. With basically an Internet connection, a person can attend different courses. Among the advantages of online learning there are the responsibility and self-discipline of students.
Disadvantages of Online Learning
Only in a small group a person can develop properly. At school, students learn how to make friends, be patient, get rid of disappointment, and especially to compete. Competition between colleagues can be very stimulating and students will only benefit from it. Online learning cannot offer human interaction.
Another disadvantage refers to the fact that online courses cannot cope with thousands of students that try to join discussions. Also, online learning can be difficult, if it is meant for disciplines that involve practice.
In conclusion, online learning should be seen as a complement and extension of classical forms of learning. Not even the best online course can fully replace the personal contact with a teacher, or the human relationships that develop in a group. So, traditional classes shouldn’t be replaced with online learning.
n channels and choosing the ones that best suit a person’s style of filtering the information.
1.Water Pollution is mainly caused as a result of improper discharge of household and industrial chemicals wastes into the water bodies.
These dangerous chemicals (in the form of solid, liquid or gases) mixes with water and make it unsafe for living bodies. Water pollutants cause harm to human-beings, animals, trees and other constituents of environment.
The sources, effects, and control measures of Water Pollution are discussed below.
Effect of water pollution on human health
- Presence of toxic metals in water may cause skin disease, dysentery, amoebiasis, anorexia, etc.
- Radioactive substances present in water may lead to radioactive pollution causing cancer.
- In polluted water the different water borne virus, bacteria, and protozoa are present. They cause small diseases likely pox, chicken pox, dysentery, amoebiasis, tuberculosis etc.
Control of water pollution
- The toxic industrial and agricultural runoff should be properly treated before mixing with water sources.
- Drinking water should be properly treated to make it free from any germs.
- The sewage system should be much more scientific.
- The waste water should be purified before it goes to the river.
- The toxic chemicals from industries should be properly treated prior to discharge into the environment.
- Cultivation of Salvinia and Azolla in the pond or lake can fix toxic metal and hence metal pollution can be reduced.
- The domestic or household effluents should be discharged properly.
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1. Write a paragraph about WATER POLLUTION by answering the questions below:
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What is water pollution?
What are the sources of water pollution?
How do farmers pollute water?
How do mills and factories pollute water?
How do ignorant people pollute water?
How do water vehicles pollute water?
How does polluted water affect us?
How can we minimize water pollution?
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Bài 1: When water becomes undrinkable and harmful for our existence, we call it polluted. Water is polluted in many ways. Firstly, farmers often use chemical fertilizer and insecticides in the corn fields. When rain and flood water wash away these chemicals into the rivers, canals or ponds and water gets polluted thereby. Secondly, mills and factories throw their waste into the rivers and canals and thus pollute water. Thirdly, ignorant people pollute water by throwing human waste and filth from drains and unsanitary latrines. Water vehicles also pollute water by dumping oil, food waste and human waste. By drinking polluted water, we suffer from fatal diseases-and die. Water pollution may cause serious environmental disaster. To minimize water pollution, various measures may be taken. However, making people aware of the dangers of pollution is the best measure to reduce water pollution to an optimum level. Bài số 2 Water pollution is one of the most serious environmental problems. It occurs when water is contaminated by such substances as human and animal wastes, toxic industrial chemicals, agricultural residues, oil and heat. Most of our water bodies— rivers, lakes, seas, oceans, estuaries and underground water sources (i.e., tubwells, bore wells) are gradually becoming polluted. In the course “Covered so far, you have seen how deforestation, urbanization, intensive agriculture and industrialization have caused pollution of water bodies. You are familiar with various aspects of air pollution, including harmful effects of acid rain. In this unit we will summaries various types of water pollution caused by different pollution sources, and also explain some important concepts such as point and non-point sources, biological oxygen demand (BOD), eutrophication, self-purification capacity of natural waters, infiltration of pollutants to groundwater, thermal pollution and pollution caused by accidents in oil tanker ships. In the next unit you will read about the degradation of land resources and terrestrial features of earth. Polluted water may look clean or dirty, but it invariably contains germs, chemicals or other materials that can cause inconvenience, illness or death.Vân Nguyễn kcj nha