The diagram shows the consumption of renewable energy in the USA from 1949-2008.
Write a report for a university lecturer identifying the main trends and making comparisons where relevant.
You should spend about 20 minutes on this task.
You should write at least 150 words.
Renewable Energy total Consumption and Major Sources, 1949 – 2008
IELTS Academic Writing Task 1: Sample Answer
The given line graph compares the usages and sources of renewable energy in the USA between 1949 and 2008. As is observed from the given diagram, overall energy consumption in the USA increased significantly and biofuels and wind power were introduced in the later years as energy sources though hydroelectric power was the main source of energy in these years.
According to the given diagram, total energy consumption in the USA in 1949 was about 3 Quadrillion Btu and it increased by approximately 5 Quadrillion Btu in 2008. Hydroelectric power was the main source of this energy and the use of this energy source fluctuated a lot. In 1949 only around 1.8 Q Btu energy was produced from hydroelectric power which was almost same as the energy produced from wood. Until 1981, wood and hydroelectric power were the main sources of energy production in the USA. After than biofuels and wind power were introduced and after 2000, more than 2 Q Btu of energy was produced using these two renewable energy sources.