The charts below show average carbon dioxide emission per person in the United kingdom, Sweden, Italy and portugal between 1967 and 2007.

The diagram illustrates the average amount of

carbon

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dioxide

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per person released into the atmosphere from 1967 to 2007 in some European countries.

Overall

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, Portugal and Italy had increasing trends in the mentioned period,

while

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, the Sweden and United Kingdom had a decreasing one. United Kingdom's average

carbon

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dioxide

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emission was the highest in all investigated years. The two areas their CO2 emission had been tediously growing over the named years were Portugal and Italy which had roughly less than 2 metric

tonnes

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and a little more than 4 metric

tonnes

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contribution in the year 1967 and both leveled over 2 and 6 metric

tonnes

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in the follow ten-year-period. In the following, they ceaselessly remained constant from 1997 to 2007 which was nearly 8 metric

tonnes

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for Italy and over 5 metric

tonnes

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for Portugal. The United Kingdom and Sweden's

carbon

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dioxide

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emission rates had a declining pattern in general that reached their lowest point in 2007, sharing approximately 9 and 5 metric

tonnes

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respectively. Releasing

carbon

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dioxide

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in Sweden had been hurriedly growing over the first ten years of the interval,

however

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, it lowered from its highest point in 1977, which was almost 10 metric

tonnes

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, without any specific fluctuation to the final year.