The line graph presents data on air pollutants released from three main sources in the UK between 1990 and 2005, measured in million tonnes
Overall, air pollution levels showed a downward trend during the studied period, except for transport which remained relatively stable. Additionally, Industrial output was the primary contributor, whereas households produced the least.
According to the diagram, the total amount of air pollutants stood at over 7 million tonnes in the beginning; thereafter it plummeted to roughly 4 million tonnes by 2005. Industry followed a similar pattern, accounting for approximately 5.5 million tonnes initially before dropping sharply to around 3 million in 1996, and continuing to decline to just 2 million by 2005.
Although both transport and households sources began at just under 1 million tonnes, transport emissions remained almost unchanged over the studied period. In contrast, households emissions experienced a modest decline with minor fluctuations, ending at around 0.4 million tonnes.
