The line graph compares the distribution of average carbon dioxide (CO2) emissions released per individual, across four distinct countries from 1967 to 2007.
Overall, there was a significant increase in the amount of carbon dioxide in both Italy and Portugal. In contrast, both the UK and Sweden had the highest rate of carbon dioxide emissions initially, but declined significantly throughout the period. However, the UK remained the biggest contributor to carbon dioxide emissions.
In detail, the UK had the highest number of average carbon dioxide emissions per person, starting with around 11 metric tonnes of CO2; however, this number gradually declined to just over 8 metric tonnes of CO2. This was followed by Sweden, initially with around 8 metric tonnes of CO2, rising to just over 10 metric tonnes of CO2. However, this figure decreased dramatically to just under 6 metric tonnes of CO2.
On the other hand, both Italy and Portugal started with a negligible amount of CO2. In Italy, this number was around 4 metric tonnes of CO2, rising to approximately 8
metric tonnes of CO2, followed by Portugal, reaching just under 6 metric tonnes of CO2 in 2007 from its previous number of less than 2 tonnes of CO2 in 1967.