The line graph illustrates how much 
carbon
 Use synonyms
dioxide
 was produced by four countries (the United Kingdom, Sweden, Italy, and Portugal) over 40 years between 1967 and 2007. Units are measured in metric tonnes.
Use synonyms
Overall
, we can clearly observe that Linking Words
emissions
 of Use synonyms
carbon
 Use synonyms
dioxide
 fell in the UK and Sweden, Use synonyms
while
 in Italy and Portugal, they increased. Linking Words
Moreover
, the UK produced the highest amount of Linking Words
carbon
 Use synonyms
dioxide
 Use synonyms
emissions
 throughout the period.
With regards to the United Kingdom, average Use synonyms
carbon
 Use synonyms
dioxide
 Use synonyms
emissions
 per person were close to 11 in 1967, and they gradually went down to 9 in 2007. Use synonyms
Similarly
, turning to Sweden, it accounted for over 8 in 1967, Linking Words
then
 reached its peak 10 years later and dramatically fell by 2007.
Linking Words
On the other hand
, Linking Words
carbon
 Use synonyms
dioxide
 produced by Italy was more than 4 at the beginning of the period, and it went up to almost 8 in 2007. Use synonyms
Likewise
, Portugal's CO2 Linking Words
emissions
 stood at around 1 before rising steadily to almost 6 by the end of the period.Use synonyms