The line graph illustrates the average carbon dioxide production per individual in four different countries, namely 
United
 Kingdom, Correct article usage
the United
Sweden
, Italy, and Portugal, over a Use synonyms
fourty-year
 period from 1967 to 2007.
Correct your spelling
forty-year
Overall
, Linking Words
while
 the carbon emissions in Italy and Portugal increased throughout the period, the production of greenhouse gas in Linking Words
UK
 and Correct article usage
the UK
Sweden
 demonstrated a Use synonyms
noticable
 decline, with the figure of Correct your spelling
noticeable
Sweden
 experiencing the most significant fluctuation.
In 1967, Use synonyms
UK
 exhibited the highest quantity of CO2 emissions of roughly 11 metric Correct article usage
the UK
tonnes
, followed by a moderate decrease to approximately 9 Use synonyms
tonnes
 in 2007. Use synonyms
Conversely
, Linking Words
while
 Linking Words
Sweden
 took Use synonyms
a 
second place Correct article usage
apply
of
 the gas release Change preposition
in
indicating
 just above 8 metric Punctuation problem
, indicating
tonnes
 in 1967 Use synonyms
but
 reached a peak of about 11 by 1977, and Punctuation problem
, but
then
 dropped significantly by nearly Linking Words
a 
half (5 Correct article usage
apply
tonnes
). 
Use synonyms
In contrast
, the figures Linking Words
of
 Italy and Portugal recorded the lowest quantity of gas emissions during the given period. Both Change preposition
for
countires
 exhibited a consistent upward trend, reaching almost 8 and 5 metric Correct your spelling
countries
tonnes
 by 2007.Use synonyms