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

The line graph illustrates the rate of carbon dioxide

emissions

by each person in four different counties in a 40-year

period

. The units are measured in metric

tonnes

. At the onset,

it is clear that

the average carbon dioxide

emissions

in the UK and Sweden decreased over the

period

,

while

in Italy and Portugal, it had an upward trend. The highest

emissions

were in the United Kingdom. Regarding the UK, it had a steady decline at the beginning of the

period

with just over 10 metric

tonnes

until it reached 8 metric

tonnes

in the

last

year of the

period

.

Likewise

, by 1977, the

emissions

in Sweden went up from almost 9 to over 10 metric

tonnes

, before oscillating until the end of the

period

with roughly 5 metric

tonnes

of

emissions

per person.

On the other hand

, the CO2

emissions

in Itlay

,

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started at around 4 metric

tonnes

in 1967 before climbing slightly to over 6 metric

tonnes

ten years later after which it palpitated in 2007 at nearly 8 metric

tonnes

. In the case of Portugal, it had the lowest

emissions

throughout with only 1 metric tonne in 1969, before rising gradually until it reached approximately 5 metric

tonnes

in the final year.