The graph illustrates the levels of acid rain emissions, measured in tonnes, produced by four different sectors between 1990 and 2007.
Overall, emissions from electricity, gas and water supply decreased sharply throughout the period. Acid rain emissions from other industries and the domestic sector also declined steadily, while transport and communication showed some fluctuations over time.
In 1990, electricity, gas and water supply was the largest source of acid rain, producing about 3.5 million tonnes. At the same time, other industries emitted approximately 2.1 million tonnes. Between 1990 and 1997, emissions from electricity, gas and water supply fell significantly, while those from other industries remained relatively stable. After that, emissions from other industries continued to decline and eventually became lower than those from electricity, gas and water supply by about 1.4 million tonnes.
By 2003, emissions from other industries and the domestic sector had decreased gradually by around 0.6 and 0.3 million tonnes respectively. In the same year, transport, communication, and electricity, gas and water supply all reached a similar level of about 0.9 million tonnes of acid rain emissions.
By the end of the period in 2007, emissions from the domestic sector and electricity, gas and water supply had fallen dramatically, decreasing by approximately 3 million tonnes compared to the beginning of the period.