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

The line chart illustrates average carbon dioxide

emissions

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per capita in metric

tonnes

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in the

UK

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,

Sweden

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, Italy and Portugal over the period from 1967 to 2007.

Overall

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，there was a marked divergence in trends：

whereas

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emissions

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per capita declined in the

UK

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and

Sweden

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，they rose steadily in Italy and Portugal. Despite these shifts, the

UK

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held the highest emitter across the entire period. Based on the chart, in the year 1967, among

emissions

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of the four countries, those of the

UK

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were 11

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,

while

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Sweden

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were 8.5

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, Italy were slightly higher than 4

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, and Portugal were under 2

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.

While

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the

UK

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declined marginally in 1977,

Sweden

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, Italy and Portugal increased

synchronisely

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synchronously

, with

Sweden

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increasing to 10.5

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, Italy reaching

at

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6.5

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and

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, and

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Portugal seeing a stable increase to 2.1

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. With thirty years' development, in 2007, the

UK

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fell significantly to 9

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, and

Sweden

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also

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jumped sharply to 5.5

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. Surprisingly, Italy and Portugal still climbed to 7.5

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and 5.5

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respectively and were almost double the

emissions

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in 1967.