The line graph sets out the amount of carbon dioxide (CO2) emitted by each individual in 4 countries over a period of 40 years. The countries are Portugal, Italy, Sweden and United Kingdom.
The highest amount of CO2 was produced by British people throughout the period shown. In 1967, CO2 emission by them was 11 metric tonnes which remained stable until 1977. But it declined steadily from 1977 to 2007 by approximately 2 metric tonnes. Conversely, although Portuguese’s CO2 emission saw the greatest rise, in all by 4 metric tonnes, the average carbon dioxide produced the lowest among 4 countries. It increased from 1967 to 1987 gently (by 2 metric tonnes), then from 1987 to 1997 with a more rapid growth (by 2 metric tonnes), and finished as the joint-lowest in 2007.
Turning to ‘Sweden’, the amount of CO2 produced by them decreased the most among all countries despite the inconsistency. It began at 8.5 metric tonnes and rose dramatically in the first 10 years (by 2 metric tonnes), but saw a drop in the second decade (by almost 3.5 metric tonnes), before finishing as the joint-lowest. It decreased slowly by 2.5 metric tonnes. Meanwhile, the average CO2 emitted by each person in Italy, which increased, saw a significant rise overall from 1967 to 1977 (4.2 to 6.3 metric tonnes) and with a more gentle growth around then 2 metric tonnes in 20 years, notably it overtook the amount of CO2 produced by each person in Sweden at 1987.
All in all, it can be seen the amount of CO2 emitted per individual in Italy and Portugal saw an increase. But it decreased in UK and Sweden. CO2 production per person in Portugal with the greatest rise and in Sweden with the greatest fall, joint-lowest at the end of the period.