The line graph compares the carbon dioxide emissions across 4 countries from 1970 to 2010. The figures are expressed in metric tonnes.
Overall, Sweden, France, and Ireland have a decreasing pattern, while Spain represented an increasing pattern in carbon dioxide emissions. Sweden had the highest proportion of carbon dioxide emissions, while Spain had the lowest in the initial year, before surpassing France in the final year.
In detail, Sweden had a peak of 14 metric tonnes in 1970, the largest recorded figure of carbon dioxide emissions among countries, and approximately 9.5 metric tonnes in 1990, before it further declined to a low of roughly 8.5 metric tonnes in 2010. Meanwhile, Ireland accounted for nearly 8.5 metric tonnes in 1970, and gradually rose from around 9 in 1980, before reaching a peak of about 11 metric tonnes in 1990. Then, the number of emissions dipped to 8 metric tonnes in 2010. By comparison, Ireland had more carbon dioxide emissions than Sweden in 1990.
Alternatively, France started at about 9.5 metric tonnes and 9.6 metric tonnes in 1970 and 1980, respectively. The figure declined considerably to almost 7 and remained stable until 2000. By 2010, the emissions decreased further to 6 metric tonnes. In 1970, Spain had a share of 4 metric tonnes and the emissions gradually rose to nearly 7.5 in 2010, which is almost twice its initial figure.