The line graph compares the amount of CO2 which was emitted by an average person in Singapore, China, Thailand and Vietnam, over a 35-year period between 1975 and 2010. Units are measured in metric tonnes per capita.
Overall, although Singapore consistently witnessed the highest CO2 emissions among the four countries, all showed an upward trend throughout the given duration.
An average person in Singapore emitted 11 tonnes of carbon in the first year, after which it fluctuated slightly and peaked at about 14 tonnes in 1990. It then dropped by half to approximately 7 tonnes in 2005 before increasing exponentially to the same value with 1975.
In 1975, the personal CO2 emission rate in China stood at nearly 2 tonnes, higher than that of Thailand and Vietnam (both equal at 0.5 tonnes). While the figure for Vietnam remained almost unchanged until 1995 before rising slightly to around 2 tonnes in 2010, the amount of CO2 emissions per individual in both Thailand and China saw a gradual rise, reaching a plateau of 3 tonnes between 1995 and 2000, after which they climbed to 4 and 6 tonnes respectively by the end of the period.