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The line graph illustrates data of energy usage in the USA during the period from 1980 to 2030. In general, the ennergy generated by fossil fuel like petrol and oil, coal, natural gas was used much more than the renewable energy like nuclear, solar/wind and hidropower.
To specify, the amount of petrol and oil using is highest through the year. Athough there was a slightly fluctuation from 1980 to 1995, the usage of this energy is expected to climb to nearly 50 quadrillion units in 2030
Like coal, the consumption of natural gas has changed unconsiderably from 1980 to 2013. However, while the amount of natural gas using is predicted to remain unchanged at about over 25, the figure for coal will constantly increase by approximately 5 quadrillion unit and reach a peak at 30 in 2030
In 1980, the consumption of the alternative power like nuclear, solar wind and hidropower was equal at 3 and much higher than the amount of fossil fuel using. During a 50 year period, the use of these energy saw a stable trend with the fluctuation of just 3 quadrillion units only.