The two graphs show the main sources of energy in the USA in the 1980s and the 1990s Write a report for a university lecturer describing the changes which occurred

The given piechart depicts the information about five different natural energy resources in U.S.A in 1980 and 1990.

It can be seen that, the percentage of oil was 33% in 1990 whereas, the proportion in 1980 was 42%. The next one was, coal it was 27% and near about one fifth in 1990 and 1980 respectively. The proportion for hydroelectric power was 5% in both years.

Probing further, the percentage for nuclear power in 1980 was one time more than in 1990. The minor difference in used of natural gas was (close to one quarter and one quarter) in two years.

Overall, the most striking features is that the maximum consumption of oil by the people of U.S.A while, less used of hydroelectric power in both years ( 1990 and 1980)