The lime graph illustrates three types of sources in UK air pollutions in millions of tonnes between 1990 and 2005.
Overall it is evident, that all the given groups decreased throughout the period except transport usage. The highest increase has seen in total number of air pollutions.
To be begin with the total number of air pollutions dominated throughout the period which was accounted for 8 million tonnes in the initial years, however it experienced a downword trend to 5 million tonnes over time. Followed by, industries which started the period with 6 million tonnes which was about 2 tonnes lower than that total number of air pollutions.
On the other hand the transport usage and household adhered to lowest categories. Both categories started the period with a similar pattern which was about 1 million tonnes. From 1990 to 1999 they both stayed stable. From 2000 the transport usage skyrocket to 3 million tonnes. Household usage decreased gradually to 1 million tonnes in the end of the period.
