The graph illustrates the 
amount
 of CO2 that individuals in four European countries emitted from 1967 to 2007. Use synonyms
Overall
, the United Kingdom and Sweden showed a declining tendency Linking Words
whereas
 Italy and Portugal produced a larger Linking Words
amount
 of CO2 in 2007. The United Kingdom is the country with the largest emission of CO2 and Portugal with the least Use synonyms
througout
 the whole examined period. 
Starting from the countries with a larger Correct your spelling
throughout
amount
 of Use synonyms
the 
emission of CO2, Portugal experienced the most dramatic rise from about 1 metric ton to above Correct article usage
apply
5metric
 Correct your spelling
5 metric
tonnes
 in 1997, from which it rose more mildly until 2007 when it reached below 6 metric Use synonyms
tonnes
. Use synonyms
Similarly
, Italy Linking Words
also
 produced a larger Linking Words
amount
 of CO2, from just above 4 metric Use synonyms
tonnes
 in 1967 to just below 8 metric Use synonyms
tonnes
 in 1997. Use synonyms
Then
 the graph for Italy remained unchanged until 2007, standing much higher than Portugal.
Turning to the graphs with a downward tendency, the United Kingdom demonstrated a constant drop from below 11 metric Linking Words
tonnes
 to approximately 9 metric Use synonyms
tonnes
 for the four decades Use synonyms
although
 it still stood at the highest of all. Sweden Linking Words
also
 experienced a more radical decline from 1977 when it reached Linking Words
the
 peak at over 10 metric Correct article usage
a
tonnes
 to below 6 metric Use synonyms
tonnes
 in 2007 in spite of a sharp increase from nearly 9 metric Use synonyms
tonnes
 to just above 10 metric Use synonyms
tonnes
 in 1977.Use synonyms