Topic: Renewable energy | Giải đề IELTS Writing Task 1
1. Đề bài: The diagram shows the consumption of renewable energy
The diagram shows the consumption of renewable energy in the USA from 1949-2008.
(Biểu đồ cho thấy mức tiêu thụ năng lượng tái tạo ở Hoa Kỳ từ năm 1949-2008.)
2. Phân tích đề bài
Dạng bài: trend chart (line chart)
Từ khóa chính: consumption, renewable energy, USA, 1949-2008: việc tiêu thụ năng lượng tái tạo ở Mỹ từ 1949-2008
Từ đồng nghĩa, trái nghĩa:
Phân tích yêu cầu đề bài: Đề bài yêu chúng ta miêu tả và so sánh xu hướng sử dụng 4 loại năng lượng tái tạo lớn là gió, xăng sinh học, thủy năng, và gỗ và tổng lượng sử dụng của tất cả các nguồn năng lượng tái tạo ở Mỹ. Lưu ý không được nêu ý kiến cá nhân trong bài này.
3. Dàn bài chi tiết
Mở bài:
Phần tổng quan (Overview):
Thân bài 1:
Thân bài 2:
The line graph highlights data about the amount of renewable energy consumed in the US between 1949 and 2008.
Overall, it can be clearly seen that there the consumption of biofuels and wind did not observe in the first 30-year period. The share of other two sections of the power, namely, wood and hydroelectric power was the similar.
Looking into details, at the beginning of the period, the amount of wood and hydroelectric power was just under 2 quadrillion Btu. In the subsequent 25 years, the figure for wood underwent a negligible change, decreasing to 1.7 quadrillion Btu. However, the rate of hydroelectric power jumped significantly, reaching a peak of about 2.5 quadrillion Btu in 1997, then the share decreased to 2 quadrillion Btu in 2000. In 2008, the figures for both of the renewable energy types finished at 2 and approximately 1.8 quadrillion Btu, respectively.
As for the remaining two energy kinds, the amount of using biofuels and wind did not overtake 2 quadrillion Btu. The figures for biofuels and wind started to rise in 1980 and finished at nearly 1.6 and 1.2 quadrillion Btu. The share of total renewable energy witnessed an upward trend, starting with 3 quadrillion Btu in 1950 and reaching a peak of 7 quadrillion Btu in 2008.
The line chart shows total amount of four types renewable energy (Hydroelectric power, wood, biofuels and wind) in USA from 1949 to 2008. The data was presented in quadrillion Btu.
Overall total energy from all sources increase more than twice from 1950 to 2000. The highest consumable energy is hydroelectric power , followed by wood and biofuels. The wind is the least renewable source that used since 1980.
Hydroelectronic power and wood are the highest consumable energy source in the USA compare with biofuels and wind. At the beginning of 1950, total consumption of the hydroelectric was slightly below the wood. But in 1960, there was a significant increase of the hydroelectric consumption from 1.7 to 2.7 quadrillion Btu, while the wood experienced decrease slighly from 1.8 to 1.5 quadrillion Btu.
Consumption of biofuels and wind started from 1980 with a small amount below 1 quadrillion Btu. In the early 2000, the biofuels showed a drastic grow with total energy almost reach 1.8 quadrillion Btu. Opposite to the biofules, the wind only showed a little increase with total energy around 1 quadrillion Btu.
The graph describes the usage of environment-friendly energy in The United States from 1949 to 2008. This essay is going to identify the main trends and make comparisons when relevant. The unit that is used is in quadrillion BTU or British Thermal Unit.
Overall, all categories have the same tendency, climbing from the beginning to the end of the diagram. It is indicated that there are two old-fashioned and two new types of energy sources.
First, the most used source for generating electricity of all time is hydroelectric power, followed by wood, biofuels, and the last, wind kinetic power. Biofuels and air have been invented and utilized since 1980. Besides, biological combustible substances were more favourable than wind from the time they were innovated until 2008.
Moreover, the utilization of water-powered generators was stagnantly increasing, except for a dip between 1987 and 1988, causing the consumption of wood to be higher than hydroelectricity. In addition, the total power consumption indicates that there are two big dips in 1977 and 2000, but, the trend was always increasing from 1950 to 2008.
The chart illustrates the amount of renewable energy consumption in the USA between 1949 and 2008, the measurement in Quadrillion Btu. Overall, what stand of the graph is that there were considerable upward trends in the consumption in Total, while Hydroelectric Power3 and wood fluctuated over the whole period. Another interesting point is that the USA consumes Biofuels2 and wind energy started in the half of period.
Looking at the details, as regards Total energy started at 4- Quadrillion Btu in the first year , and then there was a fluctuating rise until the end of the period at around 7- Quadrillion Btu. Having decreased consumption, there was a sharp drop in 2000 by around 2- 7- Quadrillion Btu. and a rapid recovery. If we look at Wood and Hydroelectric Power3 resources, they started at around 2- Quadrillion Btu and finished at the slightly decreased figure at around 2- Quadrillion Btu in 2008. Wood started with a gradual decrease until 1975, then the number dramatically improved to above 2- Quadrillion Btu in 1883. While the usage of Hydroelectric Power3 dramatically rose to 3- 2- Quadrillion Btu in 1883.
By contrast, the energy gained from Biofuels2 and wind started in 1980 and remained steady for 20 years, after which they gradually rose to reach the peak at around 0,5 and 0.7 consequently at the end of the period.
The diagram, which has great detail, illustrates sustainable energy utilization growth by source in the USA between 1949 and 2008.
Overall, it is registered to be an improvement in the use of power sources in the course of almost 50 years. Therefore, the total allotment of joules evidences this increase in the chosen depiction.
Although all resources have almost doubled their numbers in terms of usage, there are some whose evolution has been more prolific. For instance, biofuels and wind nearly doubled their results at the end of the selected period of time, starting with a rate of 0 and reaching 1 and 0.5 quadrillion Btu in 2008. Contrarily, the mid-1980s were the most popular years for using wood and hydroelectricity. They have now both tailed off to their 1950’s total.
To sum up, on a general scale biofuels and wind will replace wood and hydroelectric, in particular biofuels, which have experienced a steady upturn.
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