The Graph shows average carbon dioxide (CO2) emissions per person in the United Kindom, Sweden, Italy and Portugal between 1967 and 2007

The graph illustrates the average CO2 emissions for one person in 4 different countries in 40 year duration from 1967 to 2007. Overall, CO2 radiation in Portugal and Italy steadily increased over the time period even though Sweden and Portugal were at the same point at the end of the time period. Both upward movement and downward trend can be seen in

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graph. According to the graph, in 1967 the CO2 discharge of the Portugal and Italy were nearly 1 tone and approximately 4 tones respectively. Italy's CO2 emission exceeding Sweden CO2 emission in 1987. The figure of Portugal and Italy had the same pattern

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, both countries hit the lowest point at 5 tones and 7 tones respectively in 1997, after that

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figure remained stable until the end of the period time' United kingdom carbon dioxide emission remained stable at nearly 11 tones from 1967 to 1977. After 1997

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figure noticeably declined to 7 tones in 2007. In Sweden carbon dioxide was nearly 9 tones in 1967 and

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trend reaches a peak at nearly 11 tones in 1977even though Unfortunately,

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trend sharply fell to 5 tones in 2007.