The line graph compares average carbon dioxide (CO₂) per capita emissions in four cities, such as the UK, Sweden, Italy, and Portugal, in 1967 and 2007.
The main facts that stand out are that while emissions of CO² in the UK and Sweden witnessed a downward trend in the given period, the other two cities increased over time.
It is obvious from the graph that the United Kingdom stood at 11 metric tons in 1967. Then it declined steadily until it fell to just over 9 tonnes in 2007. As for Sweden’s emissions in 1967, it started at 9 metric tons, which was followed by a small increase to 10 tons in 1977. This figure fell to about 5 in 2007.
By contrast, Italy and Portugal saw an increase in emissions in the forty-year period. In 1985, Italy had nearly four tonnes, and Portugal stood at 1 metric tonne. Then, the emissions increased to exactly 7 and 5 metric tons in 2007, respectively.