The pie charts illustrate the proportional distribution of different energy sources utilized in the United States during two decades: the 1980s and 1990s. Five major energy sources are compared: oil, natural gas, coal, hydroelectric power, and nuclear power.
The most striking feature is that fossil fuels (oil, natural gas, and coal) dominated the energy landscape in both decades, collectively accounting for about 90% of total energy production. While oil remained the largest single source, its share decreased notably, and there was a significant increase in nuclear power’s contribution.
In 1980, oil was the predominant energy source, comprising 42% of the total, followed by natural gas at 26% and coal at 22%. The remaining portion was split between hydroelectric power and nuclear power, at 5% each. This distribution heavily favored conventional fossil fuels, which together made up 90% of energy sources.
By 1990, several notable changes had occurred. Oil’s share decreased substantially to 33%, though it remained the largest single source. Coal showed a moderate increase to 27%, while natural gas remained relatively stable at 25%. The most significant change was in nuclear power, which doubled its share to 10%, while hydroelectric power maintained its 5% contribution.