The line graph illustrates the average carbon dioxide (CO₂) emissions produced per person in four countries, namely Ireland, Sweden, France, and Spain between 1970 and 2010.
Overall, while CO₂ emissions in Spain experienced an upward trend, remaining countries saw a decline over the period.
In 1970, Sweden had the highest emissions at 14 metric tonnes per person. This figure declined sharply to around 9.5 metric tonnes by 1990, before declining more gradullay to about 8.5 metric tonnes by the end of the period. France followed a similar pattern. Its emissions remained stable at roughly 9 metric tonnes between 1970 and 1980, then fell sharply around 7 metric tonnes in 1990 and finally reached approximately 6 metric tonnes in 2010. In contrast, Spain started with the lowest level of emissions, at about 4 metric tonnes per person, unlike the other countries its emissions rose consistently throughout the period, reaching approximately 7.5 metric tonnes in 2010.
Ireland also experienced an overall decline in per capita carbon dioxide (CO₂) emissions. After reaching its peak in 1990, at 11 metric tonnes, the figure went down to 8 by the final year.