Washington: There will be no end to world population growth in this century, says the UN, adding that the world's population will increase from 7.3 billion people to 9.7 billion in 2050 and 11.2 billion at the century's end.

Asia, with a current population of 4.4 billion, is likely to remain the most populous continent, with its population expected to peak around the middle of the century at 5.3 billion and then to decline to around 4.9 billion people by the end of the century.