The graph below shows average carbon dioxide (Co2) emissions per person in the United Kingdom, Sweden, Italy and Portugal between 1967 to 2007.

The data provided in the form of a line graph compares the level of carbon dioxide (Co2) in for country from 1967 to 2007.

Overall

, the highest and lowest CO2 emissions related to the United Kingdom and Portugal over the surveyed period.

Also

,

while

there was an upward trend in the amount of CO2 gas sent into the air in Italy and Portugal, the British and Swedish were able to manage air pollution. At the beginning of the air report in 1967, the figure for

this

harmful gas in Portugal stood at 1.5,

while

that of Italy, Sweden and the United Kingdom were higher at nearly 4, 8.5 and 11, respectively. Over the next 10 years, carbon dioxide exhaustion remained roughly unchanged,

although

other mentioned nations experienced a rise in the amount of greenhouse gas. From 1977 to 1997,

this

growing trend continued in Italy and Portugal and reached nearly 5 and 8 before remaining constant onwards.

In contrast

, the carbon dioxide released into the atmosphere saw a significant drop of 4 in Sweden and a gradual decrease of 2 in the UK.