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.

As we can see on the graph of the production levels of the main kinds of

fuel

in the UK between 1981 and 2000, the most used

fuel

during

all

Correct determiner usage

apply

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this

period of time was petroleum. The

energy

units

for

this

kind of

fuel

variated

Verb problem

varied

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between 90 and 140. In comparison, values of the

energy

units

of two other fuels - coal and natural

gas

, variated between 30 to 80 for coal and 40 to 100 for natural

gas

. Another information we can get from

this

graph is that the

usage

of these three

fuel

kinds changed drastically during the period. Especially for coal and natural

gas

.

At

Change preposition

In

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the year of 1981 natural

gas

was

least

Correct article usage

the least

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used

fuel

with the

energy

units

at about 40. But in 1991 its

usage

started to

raise

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rise

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and became more popular than coal. The use of coal at the beginning of

this

timeline was about 80

units

, but

then

in 1984 a sudden drop

happend

Correct your spelling

happened

. After

that

Add a comma

that,

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there was a slight increase in its

usage

but it has never come back to the

initail

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initial

value. Shortly before a decrease in coal

usage

in 1991 happened, there

also

was

a

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an

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increase in petroleum

energy

units

Change the noun form

unit

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values.

This

probably was the reason for a sudden drop in coal production.