The line graph displays average carbon dioxide emissions each person in four different countries produced between 1967 and 2007.
Overall, while per-capita carbon emissions in the UK and Sweden went down over the course of this 40-year period, they went up in Italy and Portugal.
Despite a steady decline from about 11 to 9 metric tonnes, emissions in the UK remained higher than in the other three countries over these 40 years. Sweden’s emissions first rose from roughly 9 metric tonnes in 1967 to its maximum of about 10. 5 metric tonnes in 1977. They then dropped significantly to only around 5. 5 metric tonnes in 2007, making Sweden one of the smallest per-capita emitters of carbon dioxide of the four countries that year.
Average carbon emissions that each person in Italy was responsible for climbed gradually from approximately 4. 5 to almost 8 metric tonnes between 1967 and 2007. In Portugal, each person only produced around 1. 5 metric tonnes of emissions in 1967. This country’s emissions then grew steadily and reached a similar level to Sweden’s by 2007, at about 5. 5 metric tonnes. 
The line graph displays average  
carbon
 dioxide  
emissions
 each person in four  
different
  countries
 produced between 1967 and 2007. 
Overall
, while  
per-capita
  carbon
  emissions
 in the UK and Sweden went down over the course of this 40-year period, they went up in Italy and Portugal.
Despite a steady decline from about 11 to 9 metric tonnes,  
emissions
 in the UK remained higher than in the other three  
countries
 over these 40 years. Sweden’s  
emissions
  first
 rose from roughly 9 metric tonnes in 1967 to its maximum of about 10. 5 metric tonnes in 1977. They then dropped  
significantly
 to  
only
 around 5. 5 metric tonnes in 2007, making Sweden one of the smallest  
per-capita
 emitters of  
carbon
 dioxide of the four  
countries
 that year.
Average  
carbon
  emissions
 that each person in Italy was responsible for climbed  
gradually
 from approximately 4. 5 to almost 8 metric tonnes between 1967 and 2007. In Portugal, each person  
only
 produced around 1. 5 metric tonnes of  
emissions
 in 1967. This  
country’s
  emissions
 then grew  
steadily
 and reached a similar level to Sweden’s by 2007, at about 5. 5 metric tonnes.