Band 5+: 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.

The given illustration demonstrates the figure of different kind of renewable source of energy within 59 years in the USA.

Overall, the total number witnessed a notable increased for the first half period and then up down fluctuate after that. Furthermore, the primary energy was hydroelectric power, which was being the highest standing line chart of mostly all the time except the red line. In contrast, the amount of energy harnessed from wind was the modest.

Specifically, the hydroelectric power, from the start with approximately 1.7 quadrillion BTU rose to 2.2 through a various change between the three last decades. Trailing by was the source of energy from wood, which also saw a go up trend by 0.2 quadrillion BTU. Interestingly, wood energy once had a peak that overtook the top energy in 1987, but then relatively stabled.

Regarding the remaining renewable sources, including biofuels and wind energy. Both of those sources only produced just negligible energy from the 1981 onwards, before that time, biofuels and wind had no contribute for the USA industry. Nevertheless, biofuels energy and wind energy still shown a gradually upward trend to 1.5 and 0.2, respectively.