The graph below shows average carbon dioxide (CO2) emissions per person in the United Kingdom, Sweden, Italy, and Portugal between 1967 and 2007. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The line chart illustrates the average amount of carbon dioxide (CO2) emissions per person in the United Kingdom, Sweden, Italy, and Portugal from 1967 to 2007.

Overall

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, the UK had the highest emissions throughout the 40-year period,

although

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its figure decreased consistently. The UK started with the highest emissions at around 11 metric

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per person in 1967, and

this

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figure declined gradually to nearly 9 metric

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by 2007. Sweden, the second-highest emitter until 1987, began at approximately 9 metric

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in 1967. It rose sharply to just over 10 metric

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in 1977 but

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fell significantly, reaching almost half of its peak value by 2007. Italy saw a steady increase, starting from just over 4 metric

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in 1967 and rising to just under 8 metric

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by 1987.

This

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level remained constant for the rest of the period. Portugal, the lowest emitter throughout, saw a dramatic increase from around 1 metric tonne in 1967 to about 5 metric

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in 1997, reflecting a fivefold increase before stabilizing at these levels by 2007.