The graph below shows the production levels of the main kinds of fuel in the UK between 1981 and 2000. Summarize the formation by selecting and reporting the main features and make comparisons where relevant.

The chart presents the

production

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levels of important types of substances in the UK between 1981 and 2000

Overall

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, Petroleum had the highest

production

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level as compared to other resources.

Moreover

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, with the passage of time, the

production

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of coal decreased. At the start of

timeline

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the timeline

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, the

production

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of natural gasses remained the same but after some initial years,

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had increased. From 1981 to 1983 the generation of petroleum increased significantly and remained the same. In 1987 there was a sharp decline in manufacturing.

However

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, petroleum had the highest

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of 140 energy units as compared to other substances. In the initial

years

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years,

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coal remained in the

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of 80 energy units but there was a steep drop and

after

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this

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, the ratio of

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went down. Natural gas had the

production

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of 100 energy units which was in the middle as compared to the other two substances.