The graph provides information about the different sources of air pollutants in the United Kingdom. The data was taken from 1990 to 2005.
Overall
, almost all of the causes of toxins experienced downward for the fifteen years, except transport.
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Firstly
, total pollution had a declining trend for over a decade. It started from around 7 million in 1990 and declined to under 4 in 2005. Linking Words
Secondly
, in the industry sector, the number began from under 6 in 1990Linking Words
,
and continued to decrease to 2 million tonnes in 2005. Remove the comma
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Thirdly
, the households were about 1 million in 1990, and continued stable in 1993, Linking Words
then
experienced up and down 6 years later, before it always dropped, and reached zero in 2005.
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On the other hand
, transport and household had the same starting number in 1990. Linking Words
Conversely
, transport developed little by little for over one decade, but it was not too significant changes until 2005.Linking Words
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