The line chart illustrates emissions of acid rain, difference between four units in the UK over the 17 years.
Overall, as the graph shows the fragment of transport and communication witnessed increase in the last years. From the chart, it is clear other three sectors experienced decrease. At the beginning the part of electricity more than other three modules.
Electricity, gas and water supply declined significantly by 2 million tonnes from 1991 to 1997, then remain unchanged for about 1 year. This part decreased rapidly over the last 7 years. The domestic structure dropped slightly, from 0.6 to nearly 0.2 million tonnes over the all period.
In contrast, the infrastructure fluctuated moderately from 1991 to 2007. The peak of this segment contained 1 million in 2005, next stayed stability for almost a year. The other industries segment remained constantly at nearly 2 million tonnes over a period 2 years. In 2001 and 2005 keeped unchang approximately 1,2 and 1,2 million tonnes respectively.
