The line graph illustrates the volume of atmospheric pollutants emitted by three sectors – Industry, Transport, and Households – in a specific region of the UK over a fifteen-year period starting in 1990.
Overall, the timeframe was characterized by a stark divergence in trends; while emissions from transport experienced a consistent rise, the other two sectors saw significant reductions. Consequently, the aggregate volume of pollutants followed a downward trajectory, primarily driven by a dramatic collapse in industrial emissions.
Regarding the two converging trends at the start of the period, transport and household emissions both stood at 1 million tonnes in 1990. This parity was maintained until 1999, which served as a pivotal juncture; from this point, the two sectors moved in diametrically opposite directions. Transport emissions surged to 3 million tonnes by 2005, whereas household figures plummeted to a negligible amount. By the final year, the disparity between the two had widened to 3 million tonnes.
As for the dominant figures, industrial emissions commenced the period as the primary source of pollution at 6 million tonnes. However, this sector witnessed a marked decline, particularly between 1999 and 2002, ultimately settling at a third of its original baseline. This decline mirrored the movement of the total emissions, which, despite the surge in transport, diminished from 8 million tonnes in 1990 to a mere 5 million by the end of the timeframe.