The given diagram illustrates 
average
 Correct article usage
the average
carbon
 Use synonyms
dioxide
 (Use synonyms
CO 2
) emitted by each person in the United Correct your spelling
CO2
Kingdom
, Use synonyms
Sweden
, Italy and Portugal between 1967 and 2007.
First of all, there is a high  Use synonyms
carbon
 Use synonyms
dioxide
 Use synonyms
is 
released  in Unnecessary verb
apply
United
 Correct article usage
the United
Kingdom
 than the other countries in 1967. As a difference, Portugal was the lowest Use synonyms
carbon
 Use synonyms
dioxide
 emission. In 1977, Use synonyms
Sweden
 and Use synonyms
United
 Correct article usage
the United
Kingdom
 were Use synonyms
the
 same level of Change preposition
at the
carbon
 Use synonyms
dioxide
. Use synonyms
Likewise
, Linking Words
Sweden
 and Portugal Use synonyms
were 
emitted Unnecessary verb
apply
CO 2
 equally. Correct your spelling
CO2
United
 Correct article usage
The United
Kingdom
 emitted 11 times of Use synonyms
carbon
 Use synonyms
dioxide
 than Portugal in 1967. In 2007, Use synonyms
UK
 was almost 2 times of Portugal. Correct article usage
the UK
Although
 Linking Words
United
 Correct article usage
the United
Kingdom
 emitted the highest level of Use synonyms
carbon
 Use synonyms
dioxide
 in 1967, it Use synonyms
was 
slightly rise Unnecessary verb
apply
from1967
 to 2007. Portugal was Correct your spelling
from 1967
Change preposition
at the
the
 lowest level in 1967, it was steadily upward and never drop. Change the word
its
Similarly
, Italy Linking Words
also
 slowly raised from 1967 to 2007. Both these two countries were the same similar pattern I n1967 to 2007.
Linking Words
Overall
, Linking Words
UK
 was the highest emission among the other countries but it steadily decline in the graph. Italy and Portugal Correct article usage
the UK
were gradually go
 up.  Change the verb form
gradually went
Sweden
 sharply rise in 1937 and rapidly plunged until 1937.Use synonyms