The two pie charts illustrate the various sources of electric power in America during the time of the 1980s and 1990s.
Overall, the charts show that, the majority of americans used to get their electricity from oil and natural gas, but on the following decade the use of coal surpassed that of natural gas. More over, hydroelectric and nuclear power were the least used resources to generate power.
In the 1980s, oil attributed to 42% of the energy generated in the US, making it the main source of electricity in the country followed by natural gas. However, in the 1990s, whilest still being the main source its percentage dropped to 33%. Similarly, the rate of natural gas usage declined from 26% to 25%, making it the thired biggest in the category.
Conversely, the percentage of energy generated from coal rose from 22% in the 1980s to 27% in the 1990s overtaking natural gas. furthermore, both hydroelectric and nuclear power used to account for 5% each in the 1980s, making them the smallest contributers, and while nuclear power doubled in rate in the 90s, hydroelectric power remained unchanged, at 5%.