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CD
4 tháng 2 2018
Fresh water is the most important source of life on the earth. Any living thing may survive without food for days however it is impossible to imagine life without water and oxygen. The ever increasing human population enhances the demand of more water for purposes like drinking, washing, performing industrial processes, irrigating crops, arranging swimming pools and other water-sports centres. Water pollution is done by the people of all over the world because of increasing demands and competitions of luxuries life. Waste products from many human activities are spoiling the whole water and decreasing the amount of oxygen available in the water. Such pollutants are altering the physical, chemical, thermal, and biological characteristics of the water and adversely affecting the lives inside as well as outside the water.
When we drink the polluted water, harmful chemicals and other pollutants goes inside our body and deteriorates all the body organs functioning and puts our lives in danger. Such harmful chemicals also disturb the lives of animals and plants greatly. When plants absorb dirty water through their roots, they stop growing and die. Thousands of seabirds are killing because of the oil spilling from ships and industries. High level of water pollution is done due to the chemicals coming out of the agricultural usage of fertilizers, insecticides and pesticides. The effect of water pollution varies from place to place upon the type and amount of water contamination. The degradation of drinking water needs an urgent basis prevention method which is possible by the proper understanding and support from the end of each and every person living on the earth.
B
14 tháng 3 2020
Trâm nghỉ bạn nên tham khảo các bài sau và viết theo cách của riêng mình nha 
. Trâm có đọc qua thì thấy họ viết khá là hay và ok.
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.
AL
5 tháng 5 2021
Currently, the earth is heavily polluted, causing water pollution and air pollution. The main cause of pollution is the lack of human awareness, but partly due to floods, storms, melting snow, drought, ... are also factors that seriously affect the above water sources. Earth. Surely this all of us can also feel. The consequences of pollution are severe. It caused acid rain in European countries, destroying everything in its path. In addition, air pollution causes a variety of respiratory-related illnesses that are very serious, and studies show that air pollution can increase the frequency of respiratory allergies, particularly. are people living in urban compared to rural residents. Children raised in heavily polluted areas are more likely to experience structural changes in the nasal mucosa. This can cause airway weakness, lung infection and inflammation. Not only that, even more horrible is that it is also causing a hole in the ozone layer of the greenhouse effect, making the earth gradually warming. The melting ice at the poles makes the sea level rise higher and higher, causing flooding in lowland areas. It can also cause cancer, one of the most terrible and difficult to cure diseases at that time. We can see the horrors of pollution, so let's protect the environment together, the consequences will be greatly reduced.
HA
1
TL
15 tháng 2 2019
Air pollution is one of the most dangerous types of pollution in our world and in my area. Air pollution occurs when harmful or excessive quantities of substances including gases, particles, and biological molecules are introduced into Earth's atmosphere. It may cause diseases, allergies and even death to humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment. Both human activity and natural processes can generate air pollution. Here are many causes of air pollution: vehical exhaust fumes, fossil fuel-based power plants, exhaust from industrial plants and factories, construction and agricultural activities,household activities,...The health effects caused by air pollution may include difficulty in breathing, wheezing, coughing, asthma and worsening of existing respiratory and cardiac conditions. These effects can result in increased medication use, increased doctor or emergency department visits, more hospital admissions and premature death. The human health effects of poor air quality are far reaching, but principally affect the body's respiratory system and the cardiovascular system. Individual reactions to air pollutants depend on the type of pollutant a person is exposed to, the degree of exposure, and the individual's health status and genetics.The most common sources of air pollution include particulates, ozone, nitrogen dioxide, and sulphur dioxide. Children aged less than five years that live in developing countries are the most vulnerable population in terms of total deaths attributable to indoor and outdoor air pollution.
Bài vừa làm hôm trước xong :)))
1 tháng 6 2021
Topic 1:
English is a common language that is quite diffucult to understand and to learn. But there are many countries that speak English, making English as their native language. America is one of them. America is an English-speaking country. English is a common language in America. As you know, America is very developed, and this developed country is using 1 international language, that is English. And as I know, most Americans speak Englishs .Due to the fact that a few hundred years ago, Colossians discovered. Although American and English are 1, but in there are still some words different from English like football (soccer) or some words with "u" missing word like color (colour) or neighbor (neighbour). English is very diverse, and our country is starting to use English as a second language.
1 tháng 6 2021
Topic 2:
Summer is a fun season, so there are lots of activities in summer. We can go to the beach and play volleyball, and swim at sea. Then we can sit and enjoy the famous delicious specialties. The second activity, we can go camping together, it's fun, isn't it? Sitting by the fire together, singing good songs, it's wonderful. For those who love adventure, summer is a great vacation to explore mysterious caves, mysterious forests and even deep carpeted valleys with no bottom. And we can join the summer camp, have fun, and the summer is great, right? Summer is a great season, not only that it's also a vacation, you can have lots of fun summer activities with your family and friends. Here are my opinions, if you like, give them a try!
23 tháng 3 2020
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.
Tham khảo nè :))
When thermal pollution happens, the water temperature in streams, rivers, lakes, or oceans changes. It is one of the most serious types of pollution.
Thermal pollution can have many different causes. Power station are one factor. They use water in the nearby lakes or rivers to cool their equipment, which heats up the water. Then they dump the hot water back into its source. Thermal pollution may also happen due to the discharge of cold water from reservoirs into warm rivers.
Thermal pollution can have dramatic effects. Most aquatic creatures need a certain temperature to survive. Warmer water has less oxygen in it, and this can harm fish populations. Besides, warmer water can cause harmful algal blooms. This can change the colour of the water like in the first picture and, more seriously, the algea poisons the fish.
So, in many places, we build cooling towers like in the second picture to cool down the water from power stations.
Tham khảo
Thermal pollution is the degradation of water quality by any process that changes ambient water temperature. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. When water used as a coolant is returned to the natural environment at a higher temperature, the sudden change in temperature decreasesoxygen supply and affects ecosystem composition. Fish and other organisms adapted to particular temperature range can be killed by an abrupt change in water temperature (either a rapid increase or decrease) known as "thermal shock."
Urban runoff—stormwater discharged to surface waters from roads and parking lots—can also be a source of elevated water temperatures.