The two graphs show the main sources of energy in the USA in the 1980s and the 1990s. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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 […]

The two pie charts illustrate the primary sources of energy in the USA during the 1980s and the 1990s, categorized into oil, natural gas, coal, hydroelectric power, and nuclear power. Oil remained the dominant energy source in both decades, though its share decreased in the 1990s. While coal and nuclear power experienced slight increases, hydroelectric […]