The given line graph depicts the average carbon dioxide CO2 emissions per person in the United Kingdom, Sweden, Italy, and Portugal over a 40-year period from 1967 to 2007.
Overall, it is evident that the United Kingdom had the highest average CO2 emissions per person throughout the period, while Portugal had the lowest. Additionally, Sweden and Italy experienced fluctuations in their emissions levels over the years.
Turning to the specific data, the United Kingdom commenced with the highest average CO2 emissions per person, standing at 11 metric tonnes in 1967. This figure gradually decreased over the years, reaching just above 8 metric tonnes by 2007. In contrast, Sweden’s average emissions started at 9 metric tonnes, underwent fluctuations, and ultimately declined to slightly above 5 metric tonnes by the end of the period.
Moving on to Italy and Portugal, Italy began with average CO2 emissions of 4 metric tonnes per person, peaked at 7 metric tonnes in 1977, and then stabilized at the same level by 2007. Conversely, Portugal’s emissions started at the lowest level, standing at 1 metric tonne per person in 1967 and progressively increased to 5 metric tonnes by the end of the period.