The graph below shows UK air pollutants in millions of tons, from three different sources, between 1990 and 2005.

The line chart provides information about the

air

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pollutants

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from three different sources in millions of tonnes in the UK from 1990 to 2005. In general, there was a downward trend, except for

transport

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modes in the given time period, and

also

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a switch in the position between

transport

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and industry sources

at the end

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of the time period. Based on the total number of

air

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pollutants

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, there was a downward tendency with 2

million

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, from 1900 (8

million

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) until 2005 (6

million

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).

Moreover

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, regarding the industry-based, at the beginning of the time period, the number of

air

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pollutants

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stood in the top spot until 1999 and

then

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fell down with the same amount with the

transport

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of 3

million

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, before jumped slowly by 1

million

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and was the second place as 2

million

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.

Furthermore

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,

transport

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and households started with the same amount in 1990 with 1

million

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;

however

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,

transport

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modes showed a fluctuating trend between 1993 to 1999 and

then

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rose gradually by 2

million

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and was the first rank to 3

million

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in 2005.

On the other hand

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,

households

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household

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sources remained stable between 1993 to 1999 and experienced a slight decrease from 2002 to 2005 by 1

million

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, and there were no

air

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pollutants

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from households in 2005.