Task 2. Work in pairs. Talk with your friend about the advantages and disadvantages of using each alternative source of energy, using the suggestions from Task 1. (Làm việc theo cặp. Nói chuyện với bạn bè về những lợi thế và bất lợi của việc sử dụng mỗi nguồn năng lượng thay thế  sử dụng những từ Task 1.)

Answer

Wind solar

A: I think that can be an alternative source of energy.

B: Why do you think so?

A: Because our major sources of energy are running out while wind is abundant and unlimited.

B: I know it is also clean and safe to the enviroment.

However, it is not available when there is no wind.

Solar energy

A: I think that solar energy can be an alternative source of energy.

B: Why do you think so?

A: Because our major sources of energy are running out while solar energy is plentiful and infinite.

B: I know it is also clean and safe to the enviroment.

However, it is only possible during the day time.

Nuclear power

A: I think that nuclear power can be an alternative source ofenergy

B: Why do you think so?

A: Because our major sources of energy are running out while nuclear power is unlimited.

B: However, it can be very dangerous. A nuclear reactor releases radiation which is harmful to the environment.

Water power

A: I think that water power can be an alternative source of energy.

B: Why do you think so?

A: Because our major sources of energy are running out while water is unlimited.

B: I know it also provides energy without pollution.

However, it is expensive to build a dam for hydroeiectricity.

Geothermal heat

A: I think that geothermal heat can be an alternative source of energy.

B: Why do you think so?

A: Because our major sources of energy are running out while this heat is available.

B: I know it also provides energy without pollution.

However, it is possible only in a few places in the world.