Answer:
9 billion.
Explanation:
According to World Population Prospects, the 2008 Revision, a study prepared by the Population Division of the United Nations, if global fertility rates remained at 2008 levels, world population was expected to be of approximately 9 billion in 2050. However, according to the latest data, the current 2019 revision projects a world population of 9.75 billion in 2050.
