Itâs no secret that the worldâs population is growing. The 7.2 billion humans currently on Earth may represent only a fraction of whatâs to come. And although previous studies have predicted that the worldâs population will stabilize around 2050, a new study projects that the population may continue to grow, to the end of this century and beyond: to 9.6 billion in 2050 and 10.9 billion in 2100.
The Problem of Projections
One of the landmark studies on population projections came in 200