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Home IELTS Writing

Consumption of renewable energy in the USA

9IELTS by 9IELTS
July 18, 2022
in IELTS Writing, Academic Writing Task 1, Line Graph
Reading Time: 4 mins read
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» You should spend about 20 minutes on this task.

The diagram shows the consumption of renewable energy in the USA from 1949-2008. Write a 150-word report for a university lecturer identifying the main trends and making comparisons where relevant.

» You should write at least 150 words.

Consumption of renewable energy in the USA

Sample Answer 1


The given pie chart presents the consumption as well as sources of different forms of renewable energy in the USA from 1949 to 2008. Overall, the total energy consumed in different forms show rose with many fluctuations during this period. If we see the graph in detail, we can categorise the data into two groups.

The first group includes hydroelectric power and wood energy consumption. We can see that rate of energy consumed by hydroelectric power is higher compared to wood energy. In 1949 both energy lines touch almost the same rate of consumption, which over years pass through many ups and downs and in 2008 again match the values with the difference of around point one percent.

The second group comprises biofuels and wind energy. Both lines show almost the same trend of stability between 1949 and 1980 and then sharp rise afterwards. In 2008 grading, the consumption of biofuels was little higher than the wind energy.

To summarise, we can say that hydroelectric power was the most popular source of energy and wind power was the least. The trend of all energy forms is increased overall but in an irregular manner. Another interesting thing can be noticed that consumption of wind and biofuels remains at zero level between 1949 and 1980.

(Approximately 212 words | by Humairah Farooq) 

Sample Answer 2


The given line graph shows the main sources through which renewable energy is produced in the USA and also tells about its total consumption from 1949 to 2008.

Water and timbers have been the main means of producing energy. Initially, from 1950 to 1960 the energy provided by them has approximately been same being 2 Quadrillion BTU, but from 1960 to 1980, the production of hydroelectric power doubled than fuel provided by wood. This increased trend of making energy through water is consistent with the total energy usage. The generation of energy through biofuels and wind was introduced in 1980. Since then, they have made a contribution of less than 1 Quadrillion BTU in the production of total energy. Yet this is a significant contribution as the overall consumption of energy increased in subsequent years reaching up to a maximum of 7 Quadrillion BTU by 2008. It just dipped in 2000 because hydroelectric power also decreased during this time, but then they both rose again.

The changing trends in gross energy consumption are consistent with the generation of hydroelectric power signifying it as the major source of energy production. Wood has been the second most important source, while biofuels and wind made little contributions.

(Approximately 215 words | Written by – Anum Faisal) 

Sample Answer 3


The given line graph compares the consumption of main renewable energy sources in the United States of America from the year 1949 to 2008. As is observed from the graph, initially in 1950 about 3 quadrillions BTU of total renewable energy was used in the USA and this amount reached to about 8 quadrillions BTU in 2008.

As is presented in the line graph, wood and hydroelectric power were the two sources of renewable energy in the USA in 1950 and total 3 quadrillion BTU energies were consumed in the USA in this year. The consumption of renewable energy in the USA kept increasing each year with some fluctuations. In the year 2008, the consumption reached to around 8 quadrillions BTU.

Until 1982, wood and hydroelectric powers were the two main sources of renewable energy and these 2 sources provided the renewable energy for the USA people. After 1982, Biofuels and wind power were introduced as renewable energy sources and after then the usages of these two sources keep increasing.

To summarise, in earlier states, the wood and hydroelectric power were the main sources of renewable energy in the USA and after 2005, the usages of Bio-fuel and wind increased while the total consumption of renewable energy in the USA increased over time.

(Approximately 215 words) 

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