The line graph compares the volume of consuming fuel via different sources in the United States from 1980 to 2030.
It can be seen that the demand for all energy sources steadily increases => increases steadily over the period given. While energy from petrol and oil sources was => were the highest used among different fuels, the energy from natural sources like wind/solar was => had the lowest consumption as well as a nuclear and hydropower sources.
In 1980, there were 35 quadrillion units of petrol and oil was used, while the figures from =>of coal and natural gas sources were 16 and 20 respectively. Three fuel sources named nuclear, solar/wind and hydropower were just consumed a small amount of approximately 3.5 quadrillion units. In the period of 5 years from 1980 to 1985, there was a slight decrease in the consumption of petrol and oil and natural gas sources. This downward trend was repeated again for the sources above in the period from 1990 to 1995. From 1995 to 2015, the amount of petrol and oil consumed experienced a dramatic rise, reaching approximately 41 quadrillion units. At the same period, the figures for coal and natural gas consumed also witnessed a slow increase, reaching the same units 25 quadrillion in 2015.
During the 35 years from 1980 to 2015, solar/wind sources slightly increased => increased slightly, reaching approximately 4 and 5 quadrillion units respectively. The amount of hydropower fuel consumed fluctuated slightly in the whole period and is predicted remaining at 3 quadrillion units in 2030. Regarding the projection for next years, the amount of petrol and oil consumed is => are expected to reach above 45 quadrillion units in 2030, while the estimated units for coal and natural gas is 30 and 20 respectively.