The graph below shows average carbon dioxide emissions per person in United Kingdom, Sweden, Italy and Portugal between 1967 and 2007

The line graph displays how much carbon dioxide

emissions

were produced by

people

in four different countries over a 40-years period.

Overall

,

while

two of these countries, Italy and Portugal, showed an upward trend, others experienced a decline over time.

In addition

,

people

in the UK and Portugal were the highest and lowest emitters, respectively. With regard to the downward trend, British

people

were responsible for approximately 11 metric

tons

of

emissions

in 1967 and

this

number fell gradually to almost 9 metric

tons

by 2007.

Additionally

, in Sweden, it started with almost 8 metric

tons

of carbon

emissions

at the beginning and

then

peaked at roughly 11 metric

tons

in 1977.

This

trend went down marginally to 6 metric

tons

at the end

of the period. In terms of increase, both Italian and Portuguese

people

were starting to increase the amount of CO2

emissions

. In Italy,

emissions

of carbon dioxide were nearly 4 metric

tons

at the beginning and it rose to 8 metric

tons

by 2007. Meanwhile, in Portugal,

emissions

were under 2 metric

tons

in 1967 and it reached 6 metric

tons

by 2007, similar to Sweden.