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

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

Overall

, during the initial decade, CO2

emissions

in the United Kingdom ranked

first,

despite falling by the end of the period.

Additionally

, over

this

time frame, per-capita

emissions

of CO2 went down in the UK and Sweden,

while

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

emissions

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

tonnes

to around 5

tonnes

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

tonnes

. From 1976 to 2007,

although

the amount of CO2

emissions

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

tonnes

.

Moreover

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

tonnes

,

then

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

last

value in Portugal.