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

The line graph illustrates the carbon dioxide emitted by the four nations from 1967 to 2007 in metric

tonnes

.

Overall

, it can be seen from the chart the United Kingdom was in the highest position, which emitted more CO2 as compared to other countries.

Whereas

, Sweden's CO2 decreased after some increments. The two countries Italy and Portugal both showed steady growth in the emission of CO2. It is conspicuous that the United Kingdom emitted 11 metric

tonnes

of CO2 in the year 1967, which declined steadily and touched 9 metric

tonnes

in 2007. Sweden was the second highest, producing 9 metric

tonnes

of CO2 per person in 1967 after that it rose dramatically and struck 10.50 metric

tonnes

over a period of one decade.

Further

, it started falling down significantly and reached a minimum point of 5 metric

tonnes

in 2007. Probing ahead, Italy emitted 4.50 metric

tonnes

of CO2 per person in 1967, which rose to 6 metric

tonnes

in the 10 years period and after that, it expanded steadily and arrived at 7 metric

tonnes

in 1997,

in addition

, it plateaued in 1997 and remained constant at 7 metric

tonnes

until 2007.

In contrast

, Portugal was the lowest among all countries emitting 1% in 1967 and increased slightly until attained 5 metric

tonnes

in the 30-year period after that it was unchanged and 4 metric

tonnes

till 2007.