The line graph illustrates how the amount of air pollutants from various sources changed remarkably in the UK over a 15-year period from 1990.
Overall, there was a downswing in the total amount of air pollutants and the amount of air pollutants from numerous sources in the UK over the period, except for transport. Notably, industrial emissions consistently accounted for the largest proportion of pollutants over the period.
Beginning at approximately 7.3 million tonnes in 1990, the total amount of emissions in the UK diminished steeply to 3 million tonnes in 2005. A similar pattern could be witnessed in the amount of industrial emissions, which experienced a substantial decline from roughly 5.5 million to 2 million tonnes in 2005. Despite that, this figure retained its dominant position among the three sources of air pollutants over the time span.
In contrast, there were roughly 0.9 million tonnes of exhaust fumes from transportation in 1990, which then increased minimally to 1 million tonnes in 1993. After that, the figure for transport exhaust fumes stabilized at 1 million tonnes by the end of the period. Meanwhile, the figure for household emissions in the UK dropped slightly to 0.5 million tonnes in 1996, followed by a considerable growth to 0.8 million tonnes. This amount declined gradually to 0.1 million tonnes by 2005, becoming the lowest category in the line graph