The pie charts depict information about the sources of energy oil, natural gas, coal, hydroelectric power and nuclear power in the USA between 1980 and 1990. The units are calibrated in percentage.
The pie chart demonstrates the key sources of energy utilized in the United States. In fact, the figures are given for the periods of the1980s and 1990s.
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%.