The graph below shows average carbon dioxide (CO²) emissions per person in the United Kingdom , Sweden, Italy, and Portugal between 1967 and 2007

The graph illustrates the changes in the amount of CO2 consumed by every person from 4 different countries , from 1967 to 2007. The units are measured in metric tonnes.

Overall

,

while

the emission of carbon dioxide per person has significantly increased in Italy and Portugal, the United Kingdom and Sweden have encountered a decrease in consumption.

Firstly

, beginning with the two countries that have had an increase in CO2 emission, Portugal started from less than 2 metric tonnes per individual in 1967 and increased constantly until 2007 , reaching over 4 tons.

Similarly

, Italy's fuel consumption has grown from over 4 metric tonnes in 1967 to nearly 8 in 2007.

Secondly

, continuing with the other two countries that have encountered a decrease in the trend of fuel usage , Sweden started from more than 8 metric tons at the beginning of the period, reached its peak of over 10 units in 1977, and

then

decreased uniformly until 2007, becoming a bit over 4000 kilograms. United King's usage has constantly decreased in the given period, from nearly 11000 kilograms to less than 10000 in 2007.