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 diagrams provided detail

the

Add the preposition

with the

show examples

primary

sources

of

energy

in the USA over the course of a decade. Notably, the oil sector experienced the largest shifts,

while

alterations in other sectors were minor in comparison. In 1980, as depicted by the pie chart, oil held the predominant share at 42 per

cent

, nearly accounting for half of the total. Other

energy

sources

such

as natural gas and coal were somewhat less prevalent, representing 26 and 22 percent respectively. The least popular types of

energy

sources

were nuclear and hydroelectric power, each constituting less than 10 per

cent

. By the 1990s, the landscape had slightly evolved. Despite a decrease of 8 per

cent

, oil remained the primary

energy

source. The popularity of natural gas and coal remained fairly stable, changing by only 1 per

cent

in comparison to the previous decade. Nuclear and hydroelectric power

sources

continued to be less favoured, with shares of 10 and 5 per

cent

respectively.