The pie chart illustrates the differences of the main sources of energy in the USA between the 1980s and 1990s.
Overall, the sources of energy that increased in utilization are comprised of nuclear power and coal, while both oil and natural gas experienced a major decrease in 1990. Meanwhile, hydroelectric power remained constant based on the given year.
The sources that showed a rise in source of energy are nuclear power and coal. In 1980, coal contriuted to 22% of the country’s energy source, being ranked third, before it increased dramatically to 27% (1990). Similarly, nucluear power has been seen to grow at the same rate of 5%, that resulted to 10% at 1990.
Although oil and natural gas faced an noticeable decrease, one (hydroelectric power) ramained constant. Oil was seen to be recommended at the time (1980), ranked number 1, contributed to a significant proportion to the US energy supply of 42%, before sudden drop in the 1990s, which contributes to 33% of the country’s energy. Another source of energy that showed a slight dip of 1%, was natural gas (25% in 1990). However, hydroelectric power was the only energy source that stayed constant between the two years, contributed to only 5%.