he given pie charts depicts the information of University lecture who gave details on source of energy such as Oil, natural gas, coal, hydronic power during the period of 1980 and 1990 in USA.
After analyzing, it can be seen clearly that the production of the natural gas was almost in the next year 1990 with 25%. The demande of coal was increase in year 1990 by 27%. There was no change in hydroelectric power the value stayed same with 5% in year 1980 and 1990. It can be seen that the supply of nuclear power stayed with 5% in year 1980 but it increased in 1990 by 5% and reached on 10%. In year 1989 the production was increased with 42% however in the next 10 years the requirement of oil was fall down with 33%.
Overall, in year 1990 the source of energy like coal and nuclear power was in most demand as compare to others sources they stayed less.