The line graph illustrates the changes in the measurement of acid rain emissions, in tonnes, from four distinct sectors in the UK over a 16-year period. It is clear that emissions in the UK significantly decreased between 1990 and 2007. While the reductions from the electricity, gas, and water supply sectors were the most dramatic, emissions from the transport and communication sector remained relatively stable.
A notable decline in acid rain emissions was observed across all four sectors from 1991 to 1999. The most significant drop occurred in the electricity, gas, and water supply sectors, which halved by 1.5 million tonnes in 1999. In contrast, emissions from the transport and communication sector decreased by 0.5 million tonnes, reaching 1.5 million tonnes in 1999. Furthermore, there were no significant changes in emission trends for other industries and domestic sectors during this period.
By 2007, emissions in the natural resources industry plummeted to 0.5 million tonnes, while the figure for the transport and communication sector saw a slight increase before falling to 0.7 million tonnes. Additionally, significant were recorded in other industries and the domestic sector, with emissions dropping to 1.3 million tonnes and 0.1 million tonnes, respectively.