The 
give
 line graph illustrates the Change the form of the verb
given
carbon
 Use synonyms
dioxide
 Use synonyms
emissions
 made by people living in different countries (United Kingdom, Sweden, Italy and Portugal) over forty year period. Units are given as Use synonyms
carbon
 Use synonyms
dioxide
 Use synonyms
emissions
 in metric Use synonyms
tonnes
.
Use synonyms
Overall
 it is evident thatLinking Words
,
 Remove the comma
apply
the 
Correct article usage
apply
carbon
 Use synonyms
dioxide
 Use synonyms
emissions
 have decreased significantly in Use synonyms
United
 Kingdom and Portugal Correct article usage
the United
whereas
 these Linking Words
emissions
 show an upward trend in Italy and Portugal till 2007.
Use synonyms
Further
, it can be inferred that the British people released the highest level of Linking Words
emissions
 into the atmosphere at the beginning but reduced considerably Use synonyms
around
 9 metric Change preposition
to around
tonnes
 until 2007. People living in Sweden emitted approximately 9 metric Use synonyms
tonnes
 of Use synonyms
carbon
 Use synonyms
dioxide
 with Use synonyms
sharp
 increase in 10 Add an article
a sharp
the sharp
years
 reaching above 10 metric Use synonyms
tonnes
 and Use synonyms
then
 dramatically decreasing below 6 metric Linking Words
tonnes
 Use synonyms
at the end
 of Linking Words
period
.
Add an article
the period
Although
 the release of pollutants into Linking Words
air
 Add an article
the air
were
 quite low by Italian and Portuguese Change the verb form
was
initially
 Linking Words
but 
it has increased steadily over the Remove the conjunction
apply
years
. The Use synonyms
carbon
 Use synonyms
dioxide
 levels in Sweden started Use synonyms
around
 4 million Change preposition
at around
tonne
 and rose above 7 million Change to a plural noun
tonnes
tonnes
 in 30 Use synonyms
years
. Use synonyms
Then
, it remained unchanged for Linking Words
next
 10 Correct article usage
the next
years
. Use synonyms
Similarly
, the Linking Words
emissions
 in Portugal were the least (less than 2 metric Use synonyms
tonne
) as compared to all the countries mentioned but rose rapidly to 5 metric Change to a plural noun
tonnes
tonnes
 in 1997. In subsequent Use synonyms
years
, the emission levelled off in Use synonyms
this
 country.Linking Words