the graph below shows average carbon dioxide emissions per person in the United Kingdom, Swedan, Italy and Portugal between 1967 and 2007.

The line graph illustrates how much carbon dioxide was produced on average by each individual from 1967 to 2007 in five European countries (the UK,

Sweden

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, Italy, and Portugal). The emission is stated in metric tonnes per person for each year.

Overall

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, the British emitted the highest volume of CO2 throughout the given period. Meanwhile, even at the beginning, Portugal started as the least emitter, the country closed its gap

at the end

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with the Swedish which was in the second position early.

Furthermore

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, Italy managed to outrace

Sweden

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from being the third to the second-most in the

last

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term.

Firstly

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, approximately 11 metric tonnes of carbon dioxide were produced in the UK in the year 1967. After that, the volume steadily dropped to 8 in the next 40

years

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.

Similarly

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,

Sweden

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also

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experienced a downward trend after spiking from 8 in the first year to slightly above 8 in 1977.

As a result

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,

Sweden

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's emission value fell by 3 in 1987 and

finally

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tied with Portugal by a little lower than 6 in 2007. On the other side, the two remaining countries simultaneously climbed in terms of CO2 emission. As Italy's emissions were a little bit more than 4 in 1967, the number stably rose to below 8 in 30

years

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before remaining stable until 2007. And

then

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, Portugal which emitted around 1 in the first

years

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skyrocketed by nearly 4 in the first 30

years

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before going up and finishing in the same position as

Sweden

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.