The graph shows the amount of acid rain emissions from four different sectors in the UK between 1990 and 2007. Overall, it is clear that emissions from electricity, gas, and water supply, as well as domestic and other industries, decreased over the period, whereas transport and communication followed a contrasting trend. Notably, the electricity, gas, and water supply sector was the largest source of emissions for the first 15 years, before losing that position to other industries by the end.
Looking at the declining categories, the electricity, gas, and water supply sector emitted the highest amount at the start, approximately 3.2 million tonnes, before falling sharply to exactly 0.5 million tonnes in 2007. Meanwhile, other industries held steady at around 2 million tonnes for the first 13 years, then gradually dropped to roughly 1.2 million tonnes by 2007. The domestic sector followed a similar pattern, but from a lower starting point, beginning just above 0.5 million tonnes and ending at about 0.2 million tonnes at the end of the period.
Turning to transport and communication, which released only 0.5 million tonnes in 1990, the figure rose moderately to 1 million tonnes by 2005, but then fell back to its original level by 2007, remaining the smallest contributor throughout.