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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 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.
1. Write about a natural disaster you have read about.
The most destructive disaster that I have experienced was the flood in 2012, in Thanh Hoa province. It had been raining heavily for many days. All homes, trees and animals were flooded. The water got to the roof of houses. Damage was caused to property and people. Many people were injured and died. Rescue workers helped people trapped in the flooded houses and they brought people who were left homeless to safe place. My house was flooded but we had been evacuated before. Although the time has gone by, I still can’t forget that terrible disaster.
2. Write a passage describing the schedule for your visit (Choose 4 activities that you would like to do in a 2 day visit to Washington D.C., the capital of the USA.)
This is the schedule for our group’s 2-day visit to Washington DC. On the first day, we plan to expore the city on a hop-on-hop-off trolley at 9 am. Then at 1: 00 we are visiting the White house , where the President of the USA lives. On the second day, we are taking the shuttle bus to visit the National Children’s museum at 8:00. Then at 14-00 we plan to cycle on bike trails in Nationa park.
TK
This is the schedule for my family's 2-day visit to Hanoi. On the first day, we plan to explore the city on the bus until 11 a.m. After that, we will have lunch at Ha Thanh restaurant. Then, we will spend the rest of the day visiting some historical places such as Ho Chi Minh mausoleum; Temple of Literature. On the second day, we will go to Kangnam tower and spend our time there playing entertainment activities and going shopping. We will leave at 7 p.m that day. I hope that we will have a great time there.
TK:
This is the schedule for our group’s 2-day visit to Washington DC. On the first day, we plan to explore the city on a hop-on-hop-off trolley at 9 a.m. Then at 1:00 p.m we plan to visit the White house , where the President of the USA lives. On the second day, we take the shuttle bus to visit the National Children’s museum at 8 a.m. Then at 2 p.m we cycle on bike trails in National park. I hope I can have good time in this city.
Tham khảo :
Air pollution is a major change in the composition of the atmosphere, mainly from smoke, dust, soot, steam or air makes strange gas is not clean, there was a smell coming, reduced visibility, caused climate change, pathogenic for humans and creatures.
Air pollution caused more than 3 million people die prematurely every year, it threatens virtually all of the big city dwellers in the developing countries. According to Fox News 80% of cities in the world can not meet the standards of the World Health Organization (WHO) on air quality, which is mainly concentrated in poor countries. WHO said the level of urban air pollution worldwide has increased by 8% despite improvements in some areas. This leads to the risk of stroke, heart disease, lung cancer and a variety of respiratory problems.
Light pollution has become a great concern in my neíghborhood. It occurs because of the overuse of lighting on the street and ỉn the households. A consequence of light pollution is energy consumption that can cause further problems to the environment. It also results ỉn significant health problems such as headache and sleeping disorder. The overuse of light may even lead to accident because the glare from outdoor lighting decreases our vision. To solve this problem, I think the govemment should consider more carefully where lights are placed. Moreover, people should use more efiicient and energy-saving bulbs in their house. Finally it is important to educate people to use light modemtely. If all the residents share the same responsibility, then the issue may be solved soon.
There are many types of pollution but I think water pollution is the most dangerous.Water pollution is a phenomenon where rivers, lakes, seas and groundwater are contaminated with toxic substances in plant protection drugs, industrial wastes, domestic wastes, etc. great fruit to the lives of humans and natural creatures. There are many causes of water pollution, be it heavy rain, melting snow, storm winds, floods that accidentally bring a dirty amount of waste, dead organisms into the water environment, or volcanic eruption, sea level rise. However, human is the main factor leading to water pollution through industrial, domestic, agricultural, ... wastes into the water environment. We all know that just a sheet of paper, a carton of milk or a plastic bag is discharged into the pond environment, causing water pollution, landscape loss, and pipeline congestion. In addition, factories and enterprises are increasingly developing to serve the needs of production and consumption of people, making the source of wastewater soak up into the groundwater, causing serious water pollution. The consequences are very large, you probably do not know, up to 70% of the human body is water. People need clean water to serve daily activities. However, with the current situation of water pollution, human is the agent and can "RECEIVE DAY" is real. Because, the consequences of water pollution are huge: heavy metal contamination; Contamination of toxic organic compounds, pathogenic bacteria in water, especially wastewater. In order to effectively deal with water pollution, these solutions need to be formulated and implemented at all levels, from global, national to local. Hope you will join hands to overcome and keep the water source clean.
1/
Causes of water pollution:
+ Factories dump industrial into water.
+ Sewage from household is another cause.
+ storm water.
+ Asmosphere result
+ farm using pesticdes.
Effects of water pollution:
+ People drink contaminated water.
+ Animals eat these dead animals and may also get sick.
+ Kill aquatic plants and cause further damage.
2/
This is the schedule for my two day visit to Washington D.C.On the frist day me at 7:00 a.m we plan to Canal.Then,we go to the restaurant to have lunch at 11:30 a.m and we return luxury hotel.next,at 2:00 p.m visting the national Children's Museum.The second day,at 8:00 a.m we visiting the White House ,where the president of USA lives.Then,we go to shopping.In the afternoon,at 4:30 p.m we come my hometown.I hope our trip will be happy and hane many funny things.
^_^ Good luck in exam ^_^