The pie charts depict five primary energy sources in the United States in two intervals, 1980 and 1990. It is clear from the graphs that oil was the dominant source in both spans, and there was no significant change in s
These two pie chart depicts the ratios of the major sources of energy in two periods: 1980 and 1990 in the united state. It is clear from the graph that oil and natural gas are the main sources with more than 50%.
This pie chart depicts the ratios of the sources of energy in two period: 1980 and 1990 in the United state. It is clear from the graph that oil and natural gas are the main sources with more that 50%.
The provided two pie charts demonstrate the proportional distribution of the energy sources, namely oil, natural gas, coal, and new alternatives in the USA in percentages between 1980s and 1990s.