The graph below shows average carbon dioxide emissions per person in the Unitedv 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 chart illustrates the per capita carbon dioxide

emissions

in four countries—namely the UK,

Sweden

, Italy, and Portugal—over a 40-year period.

Overall

, the United Kingdom had the highest CO2

emissions

,

while

Portugal had the lowest.

Sweden

's

emissions

also

fluctuated significantly. In 1967, the UK was the highest contributor of CO2 with over 10

tonnes

per person, followed by

Sweden

with approximately 8

tonnes

. Italy and Portugal had much lower

emissions

, with Italy slightly over 4

tonnes

and Portugal under 2

tonnes

. The UK's

emissions

gradually decreased to just over 9

tonnes

by 2007.

Sweden

's

emissions

increased to around 10

tonnes

in 1977 but

then

dramatically decreased to about 5

tonnes

by 2007. Italy saw a significant increase in CO2

emissions

, reaching 8

tonnes

by the end of the period. Portugal's

emissions

rose steadily until 1997 and

then

slightly increased until the end of the period.