Band 9: A graph is shown below. It represents the average CO2 emissions per person among four European countries; Italy, Sweden, Portugal, and the United Kingdom over four decades, from 1967 to 2007.

The mean carbon dioxide emissions in four countries, namely the United Kingdom, Sweden, Italy, and Portugal, are illustrated on the provided line graph. The units are measured in metric tonnes per person.

Overall, while the UK and Sweden experienced a considerable decrease in carbon dioxide output, the levels in Italy and Portugal gradually increased over the years presented on the chart.

Specifically, the United Kingdom started with the highest emissions, reaching approximately 11 metric tonnes per person in 1967. However, this figure gradually declined to around 9 tonnes per individual by 2007. Sweden followed a similar trend, with emissions peaking at around 11 metric tonnes in 1977 before going down to just below 6 in the final year.

In contrast, Italy and Portugal witnessed a steady rise in carbon dioxide emissions. Italy began at around 4 metric tonnes per person in 1967 and climbed progressively to nearly double that amount in 2007. There was an even more dramatic increase in Portugal, starting at less than 2 tonnes and rising to around 5.5 by the end of the period.