The graph provides 
average
 carbon dioxide emissions per person in the United Kingdom, Correct article usage
the average
Sweden
, Italy and Portugal from 1967 to 2007.Use synonyms
Overall
, during Linking Words
this
 period, Linking Words
United
 Correct article usage
the United
Kongdom
 remained the biggest carbon dioxide emissions, with all three other countries releasing less.
In 1987, Portugal was the least country in the releasing CO2, Correct your spelling
Kingdom
while
 Linking Words
Sweden
 and Italy emitted it as much as each other. Use synonyms
However
, by 2007, the gap between these two countries had widened and considerably more gas was emitted in Italy than in Linking Words
Sweden
.
As can be seen from the graph, Italy and Portugal rose significantly, Use synonyms
however
, Linking Words
trend
 of the other two countries dropped between 1967 and 2007. Add an article
the trend
a trend
By contrast
, Linking Words
United
 Kingdom had a steady fall all time, Correct article usage
the United
while
 Linking Words
Sweden
 fluctuated wildly from 1967 to 1987 and Use synonyms
then
 had a constant Linking Words
decreasing
.Replace the word
decrease