The given line graph illustrates in the UK regarding various sources of air contaminant over the course of 15 years, commencing from 1990 to 2005
Overall, all figures for sources of pollutants experienced a decline tendency with the noticeable exception of transport. Another noteworthy feature is that the figures for industry accounted the highest position during the examined period
In 1990, the aggrerate amount of air pollutions dwarfed that of others, at 7 million tonnes, which was significant dropped to 3 million tonnes in 2005. A similar pattern can be witnessed in industry, threefolds decreasing from 6 to 2 millions at the same timeframe.
At the outset of the period, the figures for transport and household are uniform, at 1 million tonnes. Such discrepancy can be seen in the latter of the period. The emmision of household experienced a slightly declined to 5 million tonnes in 1996 followed by a increased to 0.6 in 1999 but latter decreased to 0 in 2005. Conversely, the amount of air pollution related to transport marginally increased from 1 to 1.2 between 1990 and 1996, after which it decreased to 1.1 and latter rise to 1.5 in 2005