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

The given line graph displays the average carbon dioxide

emissions

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of each person in four different countries, in separate years 1976 and 2007.

Overall

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, during the initial decade, CO2

emissions

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in the United Kingdom ranked

first,

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despite falling by the end of the period.

Additionally

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, over

this

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time frame, per-capita

emissions

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of CO2 went down in the UK and Sweden,

while

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those of Italy and Portugal increased. Throughout the entire period, average carbon dioxide

emissions

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in Portugal and Italy followed an upward pattern with the former ranging from just under 2

tonnes

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to around 5

tonnes

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, and the latter starting at nearly 4 and finishing at approximately 8

tonnes

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. From 1976 to 2007,

although

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the amount of CO2

emissions

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topped the list in the UK, they decreased slightly and reached almost 9

tonnes

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.

Moreover

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, in the beginning, the proportion of carbon dioxide saw a rising trend, which was a little above 8

tonnes

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,

then

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it reached its peak in 1977, after which it experienced a significant drop, standing at the amount of the

last

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value in Portugal.