The supplied line graph displays average carbon dioxide discharges per individual UK, Sweden, Italy and Portugal from 1967 to 2007. Overall, while CO2 emissions in the United Kingdom and Sweden experienced a decline, emissions in Italy and Portugal displayed significant growth. Among the four countries,the United Kingdom consistently had the highest emissions througout the period, while Portugal had the lowest emissions initially however saw the substantial increases over time. In 1967 CO2 emissions in metric tones of the in Italy and Portugal witnessed with a steady annual rise, while United Kingdom initially had was a peak, around 11 CO2 emissions in metric tones throughout the entire period. However, CO2 emissions in Unites Kingdom fell gradually from 1967 to 2007. At this level Swedon soared in 1967 before experiencing with dipped to 2007. Meanwhile CO2 emissions in metric tones of the Italy, Portugal witnessed with upward trend. The amount of CO2 emissions surged between 1967 and 1977 with CO2 emissions approximately 1 and 4 respectively. In 1977, there was a steadily steady increase.