I. Pollution

1. Air pollution, water pollution, soil pollution, light pollution, radioactive pollution,...

2. The most serious type of pollution is air pollution.

3. Causes: Factories dump industrial waste into lakes and rivers; Sewage from households ia another cause; Farm using pesticides to kill insects ad herbicides to kill weeds can also lead to water pollution;...

4. Effects: In many poor nations, there are frequent outbreaks of cholera and other diseases because of people drinking untreted water; Human can even die if they drink containminated water; It also causes the death of aquatic animals such as fish, crabs, or bird;..

5. Encourage people to protect the enviroment together.

II. English speaking country

1. The USA, the Unisted Kingdom, Singapore, Australia, Canada, New Zealand,..

2. Scotland is in the north of Great Britain and famous for its rich culture as well as its amazing natural beauty. Visitorr to this land can spend endless days exploring its hisoric centuries-old castle.

3. Kangaroo and Koala

4. The Liberty of USA.

5. Yes, I do. Because when we travel to another English speaking countries, we can talk with the native speeakers there in English. (Almost people in the world speak English to communicate with each other from other countries)

III.

1. Flood, Vocanic eruption, drought, stunami, tornado, earthquake, mudslide,...

2. Flood

3. When the weather comes into rain season.

4. People cut down a lot of trees, when the hydropower plants dischange water, they will flow to the village near it and when there í tô much water, it will become flood.

5. Learn about the risks and read information about natural disasters on local goverment sites.

IV. Communication

1. Yes, I do

2. Help people to contact with each other quicklier than using snail mails.

3. Sometimes good, sometime bad

4. No, they shouldn't. Because if they use Facebook too much, their study will be worse.

5. In the year 2050, science and technology will be improved, so many types of communiccation will be invented. Telepathy and holography will be invented to help people communicate with everybody in everywhere.