UNIT3:THE GREEN MOVEMENT
SKILLS
WRITING
1- geothermal /ˌdʒiːəʊˈθɜːml/(a): (thuộc) địa nhiệt
2- habitat /ˈhæbɪtæt/(n): môi trường sống
3-lifestyle /ˈlaɪfstaɪl/(n): phong cách sống
4-organic /ɔːˈɡænɪk/(a): không dùng chất nhân tạo, hữu cơ
5- purification /ˌpjʊərɪfɪˈkeɪʃn/(n): sự làm sạch, sự tinh chế
6-sustainability /səˌsteɪnəˈbɪləti/(n): việc sử dụng năng lượng tự nhiên, sản phẩm không gây hại môi trường, bền vững


VOCABULARY
As the world population is growing bigger and bigger, our energy demands are also growing. Governments and organisations have been trying to find new sources of energy to replace the fossil fuels which are running out. One of the solutions is to use green energy including solar, hydro, wind, geothermal, ocean and biomass. However, there are both advantages and disadvantages to this.

One major advantage is that they are renewable
– they can be replaced naturally and cannot be seriously depleted. This green energy also reduces the cost of operation. As a type of clean energy, they emit little or no harmful chemical pollutants into the air, so they have a minimal impact on the environment.

While it is easy to see the environmental advantages of using green energy, we must also recognise some of the disadvantages. First,
it is difficult to generate the quantities of electricity to satisfy our needs. Although the cost of operation is low, the initial cost of building and installing these new technologies are very high. Another disadvantage of using green energy is the unreliability of sources.

In conclusion, there are both advantages and disadvantages to the use of green energy. Hopefully, many of the disadvantages of these renewable sources of energy will be successfully removed through technological development and research, and they will be exploited fully to replace fossil fuels.



2. Use the ideas in the following boxes to write an essay of 180-250 words about the advantages and disadvantages of consuming organic food, using the outline of the essay in 1.
Nowadays, food safety issues are regarded as one of the most important problems people, especially those in developing countries, have to face. As a result, consumers tend to pay more and more attention to organic food. Some think it should be widely promoted while others assume it has a certain limitation when in use based on its advantages and disadvantages.
First of all, organic food is very clean and safe for people`s health because there are fewer chemicals or pesticide sprayed on it. Consequently, consumers will have more chances to use nutritional foods without any doubt. In addition, farmers use eco-friendly methods to cultivate so they spend fewer expenses on farming and are able to make big profits from selling their products.

In contrast, organic food has its own limitations, particularly for people with certain financial and geographical conditions. Producing organic products takes a lot of time and efforts and depends on many farming conditions such as suitable lands, weather, and farming methods. Accordingly, the price of organic food is quite expensive and buyers have fewer choices in favourite foods.