The line graph illustrates global population growth from 1800 to 2100, while the bar chart compares urban population figures in developed and developing regions between 2015 and 2040.
Overall, the world’s population rose slowly for more than a century before increasing in the late 20th century and is projected to decline slightly after reaching a peak. At the same time, urban populations are expected to grow steadily in both regions, with developing areas accounting for the vast majority of this increase.
According to the line graph, the global population grew gradually from around one billion in 1800 to approximately two billion by the mid 20th century. This was followed by a dramatic surge, reaching a peak of just over eight billion around 2050. Subsequently, the total population is predicted to fall moderately, dropping to roughly six billion by 2100.
The bar chart shows a contrasting but related pattern. Urban populations in developing regions are projected to rise sharply, from just over two billion in 2015 to around four billion by 2040. In comparison, developed regions show much slower growth, increasing only slightly from approximately 1.2 billion to about 1.3 billion over the same period. This indicates that future population growth will be driven primarily by urban expansion in developing parts of the world.