The given graph shows the main sources of energy for USA in 1980 and 1990.

The two pie charts give information about the main sources of energy for the USA during the decade starting from 1980.

Overall

,

it is clear that

at the beginning of the period, nuclear power was the least figure,

while

oil was a significant segment.

Subsequently

,

at the end

of the interval coal became the largest number and the lowest source of energy was hydroelectric power. The energy produced by oil comprised 42% in the first year and

this

showed a slight decrease of 9% to 33% in 1990.

Likewise

, in 1980 nuclear power used 5% which rose slowly to 10% 10 years later. With regard to the remaining methods of producing stamina, there was an approximate 0% rise in manufacturing hydroelectric influence to 5%.

On the other

hand

Add a comma

hand,

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coal increased from 22% to 27 %.