The line graph delineates the dynamic shifts in average carbon dioxide (CO2) emissions percentage from 1967 to 2007.
Broadly, there’s a discernible upward trajectory in average CO2 emissions, notably pronounced in Sweden. Initially, the United Kingdom led as the primary emitter, succeeded by Italy and Portugal, which witnessed increments from 7.5 to 9 and 5 to 7.5 metric tons respectively.
Examining the surges, Italy demonstrated a gradual escalation from 1967 to 1977, while Portugal showcased a remarkable rebound despite commencing as the lowest emitter. Portugal’s emissions surged from approximately 1 to nearly 3.5 over two decades, escalating further to 5 between 1987 and 1997. Italy experienced a moderate uptick from 6.5 to 7.5 and maintained a steady trajectory until 2007.
In contrast, the United Kingdom and Sweden exhibited distinctive trajectories. The UK experienced a significant downtrend from 11 to 9 between 1967 and 2007. Conversely, Sweden’s emissions surged from 9 to 10.5 by 1977, but then underwent a drastic decline to just over 7 between 1977 and 1987, succeeded by a marginal decrease to 5.5 over the subsequent three decades.