The pie charts illustrate the 5 type of energy sources for USA for a decade, from 1980 to 1990. The energy sources included oil, natural gas, coal, hydroelectric power and nuclear power.
The given pie charts illustrate types of five main sources of energy, namely, oil, natural gas, coal, hydroelectric and nuclear power, in the USA in 1980 and 1990.
The given pie charts compare the significant energy sources in the USA between the years 1980 and 1990. Overall, it is clear that oil and natural gas sources decreased, while coal and nuclear power increased from 1980 to