The line graph illustrates the average carbon dioxide which 
were
 emitted in four countries (the United Kingdom, Sweden, Italy, and Portugal) over 40 years, from 1967 to 2007. Units are measured in metric Change the verb form
was
tons
.
Use synonyms
Overall
, the Linking Words
emissions
 of carbon dioxide in the UK and Sweden decreased over the given years, Use synonyms
while
 in Italy and Portugal, they went up. Linking Words
Furthermore
, the United Kingdom had the highest Linking Words
emissions
 throughout, Use synonyms
whereas
 Portugal had the least.
With regards to the Linking Words
emissions
 in the UK, it began at around less than 5 and Use synonyms
then
 fell gradually to about nine metric Linking Words
tons
 in the Use synonyms
last
 year. Linking Words
Similarly
, in Sweden, it peaked at nearly 11 metric Linking Words
tons
 in 1977, after which the figure went down and dropped to a low of just around five metric Use synonyms
tons
.
On Use synonyms
other
 hand, the Correct article usage
the other
emissions
 of carbon dioxide in Italy went up slightly from 1967 to 2007. Use synonyms
Likewise
, in Portugal, it rose and peaked at roughly 5 in 2007.Linking Words