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

The line graph displays how much carbon dioxide

emissions

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were produced by

people

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in four different countries over a 40-years period.

Overall

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,

while

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two of these countries, Italy and Portugal, showed an upward trend, others experienced a decline over time.

In addition

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,

people

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in the UK and Portugal were the highest and lowest emitters, respectively. With regard to the downward trend, British

people

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were responsible for approximately 11 metric

tons

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of

emissions

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in 1967 and

this

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number fell gradually to almost 9 metric

tons

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by 2007.

Additionally

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, in Sweden, it started with almost 8 metric

tons

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of carbon

emissions

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at the beginning and

then

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peaked at roughly 11 metric

tons

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in 1977.

This

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trend went down marginally to 6 metric

tons

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at the end

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of the period. In terms of increase, both Italian and Portuguese

people

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were starting to increase the amount of CO2

emissions

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. In Italy,

emissions

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of carbon dioxide were nearly 4 metric

tons

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at the beginning and it rose to 8 metric

tons

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by 2007. Meanwhile, in Portugal,

emissions

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were under 2 metric

tons

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in 1967 and it reached 6 metric

tons

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by 2007, similar to Sweden.