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

The graph provides information on the average per capita carbon dioxide

emissions

of four countries from 1967 to 2007.

Overall

,

it is clear that

while

the UK has the highest average CO2

emissions

, Sweden's

output

has fallen over the same period. ​At the same time, people in Italy and Portugal showed a significant rise in their

emissions

levels. In 1967, UK production led to the highest levels of pollution, resulting in approximately 11 metric

tonnes

of CO2 per person

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.

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The next highest emitters were the Swedes, responsible for around 8.5

tonnes

per person, which is two times the average Italian

output

and 16 times the average Portuguese

output

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.

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The UK's CO2

output

has fallen gradually over the past 40 years, but despite a surge in 1970, people in Sweden

also

cut their

emissions

dramatically until 2007

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.

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They account for only 5 metric tons each.

By contrast

, after 1967,

emissions

from Italy and Portugal increased

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.

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At the end

of the given period, Italy was the second highest polluter, with about 8 metric

tonnes

,

while

in Portugal,

although

it was still the lowest emitter

along with

Sweden, just under 6 metric

tonnes

were produced per person.