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16 tháng 6 2018

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.

12 tháng 3 2018

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.

12 tháng 3 2018

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.

16 tháng 5 2018

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 ^_^

8 tháng 5 2021

4.There are many types of natural disasters, storms are one of them, a storm is a turbulent state in the atmosphere and a type of extreme weather.There are many types of storms: Snowstorms: a very heavy snow phenomenon. thick with strong winds. Usually occurs in cold or temperate countries. Sand tornado: also known as sand demon, is a phenomenon of sand swept up very high, occurring at noon in desert areas. To: is the phenomenon of wind speeding up suddenly, accompanied by strong thunderstorms. Thunderstorms: are storms accompanied by thunder, heavy rain or hail. Tornado: is a phenomenon of a circular swirling air stream extending from a thunderstorm cloud down to the ground, especially in that a thunderstorm can descend on empty fields (rural areas) and cities. Fire storm: is a way to call intense fires that have created their own convection system and wind, making it extremely large and difficult to control or extinguish. Tropical cyclones are rapidly rotating storm systems characterized by a center of low pressure, strong winds and a spiral cloud structure that produces heavy rain. lots of homes. The bigger the storm, the more loss of life and property. Storms often break trees and damage homes. A hurricane with a tornado can sweep people and houses away, break trees, cause crop damage, and cause accidents to planes and boats. Therefore, we must take timely measures to prevent storms, we must resist our house carefully, so we can prevent a little hảm from storm.

8 tháng 5 2021

5. To protect the environment, in my opinion, I should start with the small things that are closest to us. For example saving electricity: turn off the TV when not watching; Or do not forget to turn off the lights when going out, replacing more energy-efficient devices. Saving water: reusing water as vegetable wash instead of discarding it, you can water the plants in the garden; When washing dishes, wash in a basin, do not wash directly under running water for too long. Along with saving is keeping general hygiene. This is very important. To keep clean is to dispose of garbage in the right place; not cutting flowers to break branches destroying nature; not graffiti on the wall; When you see garbage falling on the street, you will pick it up and put it in the trash; is to plant some more trees in front of the house, etc. These everyday tasks are small, but they also play a part in protecting the environment. And if you alone do it, we will not be able to see the change in the environment for the better. But it takes the cooperation of many people to become a giant to protect the environment. 

21 tháng 6 2017

kết quả thi sao rồi

12 tháng 8 2017

mik cx dag can mot vai bai g

4 tháng 4 2021

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. 

4 tháng 4 2021

cám ơn bạn nhìu nhaaaa