describing a graph

The graph compares average carbon dioxide emissions per person in four European countries from 1967 to 2007.
In 1967 the United Kingdom released by far the largest amount of carbon dioxide, with 11 tonnes per person in average. In Sweden and in Italy the average carbon dioxide released per person was 9 tonnes and 4.5 tonnes respectively, while in Portugal much less carbon dioxide was released (just over 1 tonnes).

However, during this 40-year period the carbon dioxide emissions in the United Kingdom fell gradually to approximately 9 tonnes, while the carbon dioxide emissions in Italy and in Portugal showed an upward trend, with 7.5 tonnes and 5 tonnes in 2007 respectively.

The emissions of carbon dioxide in Sweden fluctuated more dramatically, it increased to around 11 tonnes in 1980, with a sharp decrease to about 5 tonnes. The figure was just the same as that in Portugal.

We can also see from the graph, UK remain the first who released the largest amount of carbon dioxide per person in average, while Italy overtook Sweden and became the second.