The bar chart and pie chart show the amount of carbon dioxide (CO₂) emitted by three different income groups in 1990 and 2000, and the share of the world’s population represented by each income cohort in 2000, with the figures presented in metric tonnes and percentages.
Overall, Low income group emitted the least amount of carbon and made up the lowest proportion of the world’s population. While the High income group accounted for the largest population share in 2000, despite emitting less than the Middle income group in that year.
Turning to the first chat, in 1990, the Middle income cohort recorded the highest emissions at 15 tonnes, followed closely by the High income cohort with 13 tonnes, while the Low income group contributed a mere 1 tonne. By 2000, the amount of carbon dioxide the High income cohort emitted declined marginally to 12 tonnes, with the middle income experiencing the most significant growth to 22 tonnes. Meanwhile, the the Low income group doubled its output to 2 tonnes.
As for the latter chart, the High income cohort made up 84% of the world’s population in 2000, while the Middle income cohort made up 34% of the population. Lastly, the Low income group accounted for the lowest share of the world’s population, at around 18% in 2000.
