The line graph illustrates the average per capita carbon dioxide emission in four countries, namely, Ireland, Sweden, France, and Spain, from 1970 to 2010.
Overall, Sweden accounted for the largest per capita carbon dioxide emission, although it fell after 1980. While countries like Ireland and France showed some fluctuations, Spain ranked last in it except for the period after 2000, when France dropped steadily.
Sweden started at around 14 metric tons in 1970, which continued to drop gradually until 1990, when it was recorded as 10 metric tons. An intersection was made by it at just above 10 metric tons somewhere between 1980 and 1990. Afterwards, it remained relatively stable with minor changes, reaching just above 8 metric tons in 2010.
France and Ireland both began approximately at the same point with just above 8 metric tons of emissions in 1970 and then 1980. Both experienced an opposite trend after this period, with a sharp decline in France to slightly above 6 metric tons and a rapid rise in Ireland to just below 12 metric tons before falling to 8 metric tons in 2010.
Spain started at the lowest point of 4 metric tons in 1970 before quickly shooting to slightly below 8 metric tons in 2010.