The graph below shows average carbon dioxide (co2) emissions per person in the United Kingdom

The given line chart illustrates the amount of CO2 discharged by individuals in 4 countries from 1967 to 2007, a period of 40 years. Data is given in metric tonnes. Overall, it can be clearly seen that all the figures underwent dramatic changes in the given period, the exhaustions emitted by UK and Sweden reduced with the passage of time whereas Italy and Portugal experienced an opposite trend. A glance at the graph reveals that, in 1967, the amount of carbon dioxide emission was just below 12 in the UK, in contrast, Sweden’s Carbon dioxide emissions were recorded just above 8 metric tonnes. After 10 years, England’s CO2 release started to decline gradually and on the other hand Sweden touched its zenith, at approximately 11 metric tonnes. Furthermore, the former had a moderate fall, while the latter plummeted dramatically by 2007. Thus, the United Kingdom’s carbonic acid gas discharge reached at around 9 metric tonnes, although, Sweden experienced a minimum trend at roughly 5 metric tonnes. In contrast, Italy and Portugal’s expellings were recorded at approximately 4 and 1 metric tonnes, respectively, in the initial years. However, both the countries had significant upsurge in the next two decades. Afterwards, between 1997 and 2007, Italy’s figure remained constant at roughly 8 metric tonnes and Portugal’s trend showcased a slight incline, which was lower than that of Italy by approximately 2 metric tonnes.