The line graph illustrates the average carbon dioxide emissions per person in 4 different countries: the United Kingdom, Sweden, Italy and Partugal from 1967 to 2007.
Overall, the vast majority of carbon dioxide was generated in the United Kingdom and Sweden at the beginning, but started falling by years, while Italy and Partugal’s average distribution constiteted the lowest but trended upward.
In 1967, the United Kingdom had the highest level of emissions at about 11 metric tonnes per person, followed by Sweden with around 9 tonnes. Both countries the showed downward trends, though Sweden’s emissions first increased noticeably to about 11 tonnes in 1977 befor falling sharply to 5 tonnes in 2007. The UK outputs declined more steadily, reaching just above 8 tonnes by the end of the period.
By contrast, Italy and Portugal both experienced gradual increases. Italy’s figures grew riughly 4 tonnes in 1967 to about 8 tonnes in 1997 and then remained stable. Portugal started at the lowest point, just over 1 tonne, but its discharges rose continuously, reaching 5 tonnes in 2007.