The provided pie chart compares the major source of energy for America from 1980 to 1990
Overall, oil was the most valuable source of energy in America, however, hydroelectric power was the stable in the given period
In term of 1980,the main source of energy for USA came from oil in the first decade they had 24% which was the highest in this time period and it decreased slightly in 1990 at 33%.In 1980 USA reserved natural oil for there power source at 26 % moreover, 1990 1% less than that
In 1980,Coal had 22% of usa energy source.On the other hand,there was a slight rose in source of energy in 1990 at 27 %. In 1980 and 1990 hydroelectric power remained stable at 5 % respectively. In the first year nuclear power had 5% follow this it increase slightly in 1990 at 10%