The line graph displays information about the amount of acid rain released by four separate fields in the UK, measured in million tonnes, over a period of 17 years from 1990 to 2007.
As can be seen from the chart, there was a downward trend in the amount of acid rain produced by electricity, gas and water supply, domestic activities and other industries while transport and communication took responsibility for almost the same emission. It is noticeable that household chores released the least amount of acid rain over the surveyed period.
In 1990, the volume of acid rain emitted by electricity, gas and water supply was well below 3.5, holding the first ranking. The figure for other industries was just above 2, nearly 1.5 higher than that for transport and communication. Domestic activities had the lowest emission with slightly more than 0.5.
From 1990 to 2007, the acid rain production of electricity, gas and water supply witnessed a substantial decrease by nearly 3, hitting the amount of 0.5 in 2007. The figures for other industries and household activities both gradually declined to approximately 1.25 and 0.25 respectively.
Nonetheless, this 30-year period recorded a plateau of about 0.7 million tonnes of acid rain created by transport and communication.