The given charts illustrate the major sources of energy for the USA in both the years 1980 and 1990.
Overall in both years, the main significant sources of power were natural gas and oil, in 1980 The energy production from natural gas was 26% with a minimal drop of 1% in 1990. on the other hand, the energy generated from oil was reduced by 9% in 1990. The other main source of producing power for the USA was coal, in 1980 the energy produced from coal was 22% and it rose in 1990 to about 5% and the other two sources were hydroelectric power and nuclear power, the hydroelectric power remains the same at 5% in both years and the nuclear power had slightly changed and goes up in 1990 about 5% in 1980 it was on 5% and in 1990 it was on 10%.
These Charts Show how the main production Sources changed over the years.