Not every tonne of aviation CO2 is created equal
Now that the ICCT has compiled global data for 2018, it is possible to identify the top emitters that year in terms of adjusted per capita CO2 emissions. The results are shown in the figure below. After adjusting for the above-described tourism and hub effects, we see that the average Singaporean generated more than 1.2 tonnes of aviation CO2 emissions in 2018—12 times the global average. Finland and Iceland were second and third, respectively, emitting around 1 tonne of CO2 per capita. Swedes, who started the flygskam (“flying shame”) movement, emitted the seventh largest amount of aviation CO2 on a per capita basis in 2018. A country’s level of economic development undeniably plays a role here, as in each of these countries, a larger-than-average portion of the population has enough money to fly.
When it comes to reducing aviation emissions, not every choice has the same impact.
That is indeed important factor... in addition to geographical location? All top countries are countries where it's difficult to get anywhere any other way.